char = T;code = 84
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = e;code = 101
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 = y;code = 121
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = c;code = 99
char = y;code = 121
char = a;code = 97
char = n;code = 110
char = i;code = 105
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = s;code = 115
char = .;code = 46
result sql = Tandem mass spectrometry for sequencing proanthocyanidins.
Tandem mass spectrometry for sequencing proanthocyanidins.
char = P;code = 80
char = r;code = 114
char = o;code = 111
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = c;code = 99
char = y;code = 121
char = a;code = 97
char = n;code = 110
char = i;code = 105
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = P;code = 80
char = A;code = 65
char = s;code = 115
char = );code = 41
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = g;code = 103
char = r;code = 114
char = o;code = 111
char = u;code = 117
char = p;code = 112
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = b;code = 98
char = i;code = 105
char = o;code = 111
char = f;code = 102
char = l;code = 108
char = a;code = 97
char = v;code = 118
char = o;code = 111
char = n;code = 110
char = o;code = 111
char = i;code = 105
char = d;code = 100
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = o;code = 111
char = l;code = 108
char = i;code = 105
char = g;code = 103
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = b;code = 98
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = n;code = 110
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = u;code = 117
char = n;code = 110
char = i;code = 105
char = t;code = 116
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = l;code = 108
char = y;code = 121
char = p;code = 112
char = h;code = 104
char = e;code = 101
char = n;code = 110
char = o;code = 111
char = l;code = 108
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = d;code = 100
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = b;code = 98
char = u;code = 117
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 = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = p;code = 112
char = l;code = 108
char = a;code = 97
char = n;code = 110
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 = a;code = 97
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = p;code = 112
char = a;code = 97
char = r;code = 114
char = t;code = 116
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 = h;code = 104
char = u;code = 117
char = m;code = 109
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = e;code = 101
char = t;code = 116
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = L;code = 76
char = C;code = 67
char = -;code = 45
char = t;code = 116
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = e;code = 101
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 = (;code = 40
char = L;code = 76
char = C;code = 67
char = /;code = 47
char = E;code = 69
char = S;code = 83
char = I;code = 73
char = -;code = 45
char = M;code = 77
char = S;code = 83
char = (;code = 40
char = n;code = 110
char = );code = 41
char = );code = 41
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = d;code = 100
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 = o;code = 111
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = n;code = 110
char = c;code = 99
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 = s;code = 115
char = e;code = 101
char = ;code = 32
char = u;code = 117
char = b;code = 98
char = i;code = 105
char = q;code = 113
char = u;code = 117
char = i;code = 105
char = t;code = 116
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = i;code = 105
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 = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = s;code = 115
char = c;code = 99
char = r;code = 114
char = i;code = 105
char = b;code = 98
char = e;code = 101
char = d;code = 100
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = h;code = 104
char = y;code = 121
char = d;code = 100
char = r;code = 114
char = o;code = 111
char = x;code = 120
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 = 32
char = p;code = 112
char = a;code = 97
char = t;code = 116
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = f;code = 102
char = l;code = 108
char = a;code = 97
char = v;code = 118
char = a;code = 97
char = n;code = 110
char = o;code = 111
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = k;code = 107
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = A;code = 65
char = -;code = 45
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = B;code = 66
char = -;code = 45
char = t;code = 116
char = y;code = 121
char = p;code = 112
char = e;code = 101
char = ;code = 32
char = P;code = 80
char = A;code = 65
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 = 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 = 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 = ;code = 32
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
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 = a;code = 97
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = -;code = 45
char = D;code = 68
char = i;code = 105
char = e;code = 101
char = l;code = 108
char = s;code = 115
char = -;code = 45
char = A;code = 65
char = l;code = 108
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = (;code = 40
char = R;code = 82
char = D;code = 68
char = A;code = 65
char = );code = 41
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = h;code = 104
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = o;code = 111
char = c;code = 99
char = y;code = 121
char = c;code = 99
char = l;code = 108
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = (;code = 40
char = H;code = 72
char = R;code = 82
char = F;code = 70
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = v;code = 118
char = e;code = 101
char = l;code = 108
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = n;code = 110
char = z;code = 122
char = o;code = 111
char = f;code = 102
char = u;code = 117
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = -;code = 45
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = (;code = 40
char = B;code = 66
char = F;code = 70
char = F;code = 70
char = );code = 41
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = s;code = 115
char = c;code = 99
char = r;code = 114
char = i;code = 105
char = b;code = 98
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = h;code = 104
char = e;code = 101
char = r;code = 114
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 = f;code = 102
char = i;code = 105
char = r;code = 114
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = t;code = 116
char = i;code = 105
char = m;code = 109
char = e;code = 101
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = i;code = 105
char = n;code = 110
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = Q;code = 81
char = M;code = 77
char = );code = 41
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
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 = u;code = 117
char = b;code = 98
char = u;code = 117
char = n;code = 110
char = i;code = 105
char = t;code = 116
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = q;code = 113
char = u;code = 117
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 = h;code = 104
char = e;code = 101
char = ;code = 32
char = P;code = 80
char = A;code = 65
char = s;code = 115
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 = d;code = 100
char = i;code = 105
char = a;code = 97
char = g;code = 103
char = n;code = 110
char = o;code = 111
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
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 = H;code = 72
char = R;code = 82
char = F;code = 70
char = /;code = 47
char = R;code = 82
char = D;code = 68
char = A;code = 65
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = H;code = 72
char = R;code = 82
char = F;code = 70
char = /;code = 47
char = B;code = 66
char = F;code = 70
char = F;code = 70
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = R;code = 82
char = D;code = 68
char = A;code = 65
char = /;code = 47
char = H;code = 72
char = R;code = 82
char = F;code = 70
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = g;code = 103
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = Q;code = 81
char = M;code = 77
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = t;code = 116
char = a;code = 97
char = l;code = 108
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result sql = Proanthocyanidins (PAs) are a group of bioflavonoids consisting of oligomers based on catechin monomeric units. These polyphenolic compounds are widely distributed in higher plants and are an integral part of the human diet. A sensitive LC-tandem mass spectrometric (LC/ESI-MS(n)) method in the positive ion mode for sequencing these ubiquitous and highly beneficial antioxidants is described. The hydroxylation patterns and interflavanoid linkage for A- and B-type PAs were determined by fragment ions derived from a retro-Diels-Alder (RDA) fission, heterocyclic ring fission (HRF), a novel benzofuran-forming (BFF) fission described here for the first time, and a quinone methide (QM) fission. The subunit sequence of the PAs was determined by diagnostic ions derived from HRF/RDA fission, HRF/BFF fission, and RDA/HRF fission together with QM fission. A total of 26 PAs were reliably sequenced by the newly established tandem mass spectrometric protocol. It is shown that the protocol based on a combination of these different fragmentation patterns allows for uniquely identifying PA oligomers.

Publication: Anal. Chem. 2007 Feb 15 ;79(4)::1739-48.
Publication Date: 2007 Feb 15
Study Author(s): Li, Hui-Jing;Deinzer, Max L;
Institution: Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, USA.
Shortcut link to this study:
Proanthocyanidins (PAs) are a group of bioflavonoids consisting of oligomers based on catechin monomeric units. These polyphenolic compounds are widely distributed in higher plants and are an integral part of the human diet. A sensitive LC-tandem mass spectrometric (LC/ESI-MS(n)) method in the positive ion mode for sequencing these ubiquitous and highly beneficial antioxidants is described. The hydroxylation patterns and interflavanoid linkage for A- and B-type PAs were determined by fragment ions derived from a retro-Diels-Alder (RDA) fission, heterocyclic ring fission (HRF), a novel benzofuran-forming (BFF) fission described here for the first time, and a quinone methide (QM) fission. The subunit sequence of the PAs was determined by diagnostic ions derived from HRF/RDA fission, HRF/BFF fission, and RDA/HRF fission together with QM fission. A total of 26 PAs were reliably sequenced by the newly established tandem mass spectrometric protocol. It is shown that the protocol based on a combination of these different fragmentation patterns allows for uniquely identifying PA oligomers.
PMID: 17297981

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