char = P;code = 80
char = h;code = 104
char = o;code = 111
char = t;code = 116
char = o;code = 111
char = c;code = 99
char = h;code = 104
char = e;code = 101
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = u;code = 117
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = l;code = 108
char = e;code = 101
char = a;code = 97
char = d;code = 100
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = o;code = 111
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = b;code = 98
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = p;code = 112
char = e;code = 101
char = u;code = 117
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = s;code = 115
char = .;code = 46
result sql = Photochemical degradation of citrate buffers leads to covalent acetonation of recombinant protein therapeutics.
Photochemical degradation of citrate buffers leads to covalent acetonation of recombinant protein therapeutics.
char = N;code = 78
char = o;code = 111
char = v;code = 118
char = e;code = 101
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = d;code = 100
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = a;code = 97
char = d;code = 100
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = N;code = 78
char = -;code = 45
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = y;code = 121
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = b;code = 98
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = n;code = 110
char = o;code = 111
char = c;code = 99
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = b;code = 98
char = o;code = 111
char = d;code = 100
char = i;code = 105
char = e;code = 101
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = P;code = 80
char = h;code = 104
char = o;code = 111
char = t;code = 116
char = o;code = 111
char = c;code = 99
char = h;code = 104
char = e;code = 101
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = u;code = 117
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = l;code = 108
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = l;code = 108
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = i;code = 105
char = r;code = 114
char = o;code = 111
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = m;code = 109
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = d;code = 100
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = k;code = 107
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = t;code = 116
char = w;code = 119
char = e;code = 101
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = b;code = 98
char = s;code = 115
char = e;code = 101
char = r;code = 114
char = v;code = 118
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = d;code = 100
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = c;code = 99
char = l;code = 108
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = b;code = 98
char = l;code = 108
char = i;code = 105
char = s;code = 115
char = h;code = 104
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = d;code = 100
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = ;code = 32
char = p;code = 112
char = h;code = 104
char = o;code = 111
char = t;code = 116
char = o;code = 111
char = c;code = 99
char = h;code = 104
char = e;code = 101
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = o;code = 111
char = t;code = 116
char = o;code = 111
char = p;code = 112
char = e;code = 101
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = b;code = 98
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = (;code = 40
char = 1;code = 49
char = 3;code = 51
char = );code = 41
char = C;code = 67
char = ;code = 32
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = r;code = 114
char = y;code = 121
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = r;code = 114
char = u;code = 117
char = c;code = 99
char = t;code = 116
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = d;code = 100
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = n;code = 110
char = u;code = 117
char = c;code = 99
char = l;code = 108
char = e;code = 101
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = g;code = 103
char = n;code = 110
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = o;code = 111
char = n;code = 110
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = N;code = 78
char = M;code = 77
char = R;code = 82
char = );code = 41
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = c;code = 99
char = o;code = 111
char = p;code = 112
char = y;code = 121
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = d;code = 100
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = e;code = 101
char = d;code = 100
char = -;code = 45
char = f;code = 102
char = r;code = 114
char = e;code = 101
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = l;code = 108
char = y;code = 121
char = c;code = 99
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = r;code = 114
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = k;code = 107
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = N;code = 78
char = -;code = 45
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = o;code = 111
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = u;code = 117
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = o;code = 111
char = n;code = 110
char = .;code = 46
char = ;code = 32
char = R;code = 82
char = e;code = 101
char = s;code = 115
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = a;code = 97
char = g;code = 103
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = g;code = 103
char = l;code = 108
char = y;code = 121
char = c;code = 99
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = d;code = 100
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = d;code = 100
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = t;code = 116
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = ;code = 32
char = (;code = 40
char = 1;code = 49
char = 3;code = 51
char = );code = 41
char = C;code = 67
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = b;code = 98
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = e;code = 101
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = c;code = 99
char = o;code = 111
char = r;code = 114
char = p;code = 112
char = o;code = 111
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = i;code = 105
char = r;code = 114
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = t;code = 116
char = .;code = 46
char = ;code = 32
char = W;code = 87
char = h;code = 104
char = i;code = 105
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = k;code = 107
char = n;code = 110
char = o;code = 111
char = w;code = 119
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = o;code = 111
char = i;code = 105
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = C;code = 67
char = O;code = 79
char = (;code = 40
char = 2;code = 50
char = );code = 41
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = u;code = 117
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = v;code = 118
char = a;code = 97
char = r;code = 114
char = i;code = 105
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = e;code = 101
char = d;code = 100
char = i;code = 105
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = p;code = 112
char = h;code = 104
char = o;code = 111
char = t;code = 116
char = o;code = 111
char = c;code = 99
char = h;code = 104
char = e;code = 101
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = s;code = 115
char = y;code = 121
char = s;code = 115
char = t;code = 116
char = e;code = 101
char = m;code = 109
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = t;code = 116
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = n;code = 110
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = w;code = 119
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = u;code = 117
char = s;code = 115
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = o;code = 111
char = n;code = 110
char = y;code = 121
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = .;code = 46
char = ;code = 32
char = O;code = 79
char = u;code = 117
char = r;code = 114
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = v;code = 118
char = i;code = 105
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = u;code = 117
char = n;code = 110
char = k;code = 107
char = n;code = 110
char = o;code = 111
char = w;code = 119
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = o;code = 111
char = n;code = 110
char = y;code = 121
char = l;code = 108
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = e;code = 101
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = o;code = 111
char = r;code = 114
char = k;code = 107
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = s;code = 115
char = o;code = 111
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = l;code = 108
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = p;code = 112
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = a;code = 97
char = l;code = 108
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = b;code = 98
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = p;code = 112
char = e;code = 101
char = u;code = 117
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = s;code = 115
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = m;code = 109
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = u;code = 117
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
result sql = Novel acetone and aldimine covalent adducts were identified on the N-termini and lysine side chains of recombinant monoclonal antibodies. Photochemical degradation of citrate buffers, in the presence of trace levels of iron, is demonstrated as the source of these modifications. The link between degradation of citrate and the observed protein modifications was conclusively established by tracking the citrate decomposition products and protein adducts resulting from photochemical degradation of isotope labeled (13)C citrate by mass spectrometry. The structure of the acetone modification was determined by nuclear magnetic resonance (NMR) spectroscopy on modified-free glycine and found to correspond to acetone linked to the N-terminus of the amino acid through a methyl carbon. Results from mass spectrometric fragmentation of glycine modified with an acetone adduct derived from (13)C labeled citrate indicated that the three central carbons of citrate are incorporated onto protein amines in the presence of iron and light. While citrate is known to stoichiometrically decompose to acetone and CO(2) through various intermediates in photochemical systems, it has never been shown to be a causative agent in protein carbonylation. Our results point to a previously unknown source for the generation of reactive carbonyl species. This work also highlights the potential deleterious impact of trace metals on recombinant protein therapeutics formulated in citrate buffers.

Publication: Protein Sci. 2010 Nov ;19(11)::2152-63. :doi: 10.1002/pro.495.
Publication Date: 2010 Nov
Study Author(s): Valliere-Douglass, John F;Connell-Crowley, Lisa;Jensen, Randy;Schnier, Paul D;Trilisky, Egor;Leith, Matt;Follstad, Brian D;Kerr, Jennifer;Lewis, Nathan;Vunnum, Suresh;Treuheit, Michael J;Balland, Alain;Wallace, Alison;
Institution: Department of Analytical and Formulation Sciences, Amgen, Seattle, Washington 98119, USA.
Shortcut link to this study:
Novel acetone and aldimine covalent adducts were identified on the N-termini and lysine side chains of recombinant monoclonal antibodies. Photochemical degradation of citrate buffers, in the presence of trace levels of iron, is demonstrated as the source of these modifications. The link between degradation of citrate and the observed protein modifications was conclusively established by tracking the citrate decomposition products and protein adducts resulting from photochemical degradation of isotope labeled (13)C citrate by mass spectrometry. The structure of the acetone modification was determined by nuclear magnetic resonance (NMR) spectroscopy on modified-free glycine and found to correspond to acetone linked to the N-terminus of the amino acid through a methyl carbon. Results from mass spectrometric fragmentation of glycine modified with an acetone adduct derived from (13)C labeled citrate indicated that the three central carbons of citrate are incorporated onto protein amines in the presence of iron and light. While citrate is known to stoichiometrically decompose to acetone and CO(2) through various intermediates in photochemical systems, it has never been shown to be a causative agent in protein carbonylation. Our results point to a previously unknown source for the generation of reactive carbonyl species. This work also highlights the potential deleterious impact of trace metals on recombinant protein therapeutics formulated in citrate buffers.
PMID: 20836085

Have comments? Post them here:

comments powered by Disqus

Get breaking news about nutritional cures, dangerous chemicals, superfoods . and more.

Subscribe to the FREE Natural News email newsletter. Your privacy is protected.