char = A;code = 65
char = ;code = 32
char = d;code = 100
char = e;code = 101
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 = e;code = 101
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = p;code = 112
char = a;code = 97
char = r;code = 114
char = t;code = 116
char = i;code = 105
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = D;code = 68
char = N;code = 78
char = A;code = 65
char = -;code = 45
char = b;code = 98
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = q;code = 113
char = u;code = 117
char = i;code = 105
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
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 = 67
char = o;code = 111
char = m;code = 109
char = A;code = 65
char = -;code = 45
char = d;code = 100
char = e;code = 101
char = p;code = 112
char = e;code = 101
char = n;code = 110
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = o;code = 111
char = r;code = 114
char = u;code = 117
char = m;code = 109
char = ;code = 32
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 = s;code = 115
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = B;code = 66
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = l;code = 108
char = l;code = 108
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = b;code = 98
char = t;code = 116
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = s;code = 115
char = .;code = 46
result sql = A degenerate tripartite DNA-binding site required for activation of ComA-dependent quorum response gene expression in Bacillus subtilis.
A degenerate tripartite DNA-binding site required for activation of ComA-dependent quorum response gene expression in Bacillus subtilis.
char = I;code = 73
char = n;code = 110
char = ;code = 32
char = B;code = 66
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = l;code = 108
char = l;code = 108
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = b;code = 98
char = t;code = 116
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = s;code = 115
char = c;code = 99
char = r;code = 114
char = i;code = 105
char = p;code = 112
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = m;code = 109
char = A;code = 65
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = b;code = 98
char = i;code = 105
char = o;code = 111
char = l;code = 108
char = o;code = 111
char = g;code = 103
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = c;code = 99
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
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 = s;code = 115
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = p;code = 112
char = u;code = 117
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 = d;code = 100
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = .;code = 46
char = ;code = 32
char = E;code = 69
char = x;code = 120
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = p;code = 112
char = t;code = 116
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = e;code = 101
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 = o;code = 111
char = r;code = 114
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = e;code = 101
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 = t;code = 116
char = i;code = 105
char = v;code = 118
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = m;code = 109
char = A;code = 65
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = p;code = 112
char = u;code = 117
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 = d;code = 100
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = t;code = 116
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = ;code = 32
char = c;code = 99
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = d;code = 100
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 = e;code = 101
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = w;code = 119
char = h;code = 104
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
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 = 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 = s;code = 115
char = i;code = 105
char = g;code = 103
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = p;code = 112
char = t;code = 116
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = ,;code = 44
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = m;code = 109
char = A;code = 65
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = g;code = 103
char = e;code = 101
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = i;code = 105
char = n;code = 110
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 = 46
char = ;code = 32
char = A;code = 65
char = t;code = 116
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 = d;code = 100
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 = e;code = 101
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = w;code = 119
char = h;code = 104
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
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 = 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 = s;code = 115
char = i;code = 105
char = g;code = 103
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = p;code = 112
char = t;code = 116
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = s;code = 115
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 = 44
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = m;code = 109
char = A;code = 65
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
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 = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = s;code = 115
char = c;code = 99
char = r;code = 114
char = i;code = 105
char = p;code = 112
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 = a;code = 97
char = t;code = 116
char = ;code = 32
char = l;code = 108
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = n;code = 110
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = v;code = 118
char = o;code = 111
char = l;code = 108
char = v;code = 118
char = e;code = 101
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 = d;code = 100
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = l;code = 108
char = o;code = 111
char = p;code = 112
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = a;code = 97
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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
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char = p;code = 112
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char = d;code = 100
char = u;code = 117
char = c;code = 99
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char = i;code = 105
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char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
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char = d;code = 100
char = a;code = 97
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char = i;code = 105
char = v;code = 118
char = e;code = 101
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char = e;code = 101
char = n;code = 110
char = z;code = 122
char = y;code = 121
char = m;code = 109
char = e;code = 101
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 = n;code = 110
char = t;code = 116
char = i;code = 105
char = b;code = 98
char = i;code = 105
char = o;code = 111
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = W;code = 87
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = o;code = 111
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char = n;code = 110
char = d;code = 100
char = ;code = 32
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char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = m;code = 109
char = A;code = 65
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char = b;code = 98
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = s;code = 115
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = e;code = 101
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char = e;code = 101
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char = e;code = 101
char = r;code = 114
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char = a;code = 97
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char = t;code = 116
char = e;code = 101
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char = s;code = 115
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char = q;code = 113
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char = c;code = 99
char = e;code = 101
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char = c;code = 99
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char = s;code = 115
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char = s;code = 115
char = t;code = 116
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char = n;code = 110
char = g;code = 103
char = ;code = 32
char = o;code = 111
char = f;code = 102
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 = D;code = 68
char = N;code = 78
char = A;code = 65
char = -;code = 45
char = b;code = 98
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = g;code = 103
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char = d;code = 100
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char = i;code = 105
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char = a;code = 97
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = o;code = 111
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char = ;code = 32
char = ";code = 34
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = o;code = 111
char = g;code = 103
char = n;code = 110
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = m;code = 109
char = e;code = 101
char = n;code = 110
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char = s;code = 115
char = .;code = 46
char = ";code = 34
char = ;code = 32
char = M;code = 77
char = u;code = 117
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = a;code = 97
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = y;code = 121
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char = e;code = 101
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = h;code = 104
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char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
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char = a;code = 97
char = t;code = 116
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char = a;code = 97
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = e;code = 101
char = e;code = 101
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char = r;code = 114
char = e;code = 101
char = c;code = 99
char = o;code = 111
char = g;code = 103
char = n;code = 110
char = i;code = 105
char = t;code = 116
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result sql = In Bacillus subtilis, the transcription factor ComA activates several biological processes in response to increasing population density. Extracellular peptide signaling is used to coordinate the activity of ComA with population density. At low culture densities, when the concentration of signaling peptides is lowest, ComA is largely inactive. At higher densities, when the concentration of signaling peptides is higher, ComA is active and activates the transcription of at least nine operons involved in the development of competence and in the production of degradative enzymes and antibiotics. We found that ComA binds a degenerate tripartite sequence consisting of three DNA-binding determinants or "recognition elements." Mutational analyses showed that all three recognition elements are required for transcription activation in vivo and for specific DNA binding by ComA in vitro. Degeneracy of the recognition elements in the ComA-binding site is an important regulatory feature for coordinating transcription with population density (i.e., promoters containing an optimized binding site have high activity at low culture density and are no longer regulated in the normal-density-dependent manner). We found that purified ComA forms a dimer in solution, and we propose a model for how two dimers of ComA bind to an odd number of DNA-binding determinants to activate transcription of target genes. This DNA-protein architecture for transcription activation appears to be conserved for ComA homologs in other Bacillus species.

Publication: J. Mol. Biol. 2008 Aug 29 ;381(2)::261-75. :doi: 10.1016/j.jmb.2008.06.035.
Publication Date: 2008 Aug 29
Study Author(s): Griffith, Kevin L;Grossman, Alan D;
Institution: Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Shortcut link to this study:
In Bacillus subtilis, the transcription factor ComA activates several biological processes in response to increasing population density. Extracellular peptide signaling is used to coordinate the activity of ComA with population density. At low culture densities, when the concentration of signaling peptides is lowest, ComA is largely inactive. At higher densities, when the concentration of signaling peptides is higher, ComA is active and activates the transcription of at least nine operons involved in the development of competence and in the production of degradative enzymes and antibiotics. We found that ComA binds a degenerate tripartite sequence consisting of three DNA-binding determinants or "recognition elements." Mutational analyses showed that all three recognition elements are required for transcription activation in vivo and for specific DNA binding by ComA in vitro. Degeneracy of the recognition elements in the ComA-binding site is an important regulatory feature for coordinating transcription with population density (i.e., promoters containing an optimized binding site have high activity at low culture density and are no longer regulated in the normal-density-dependent manner). We found that purified ComA forms a dimer in solution, and we propose a model for how two dimers of ComA bind to an odd number of DNA-binding determinants to activate transcription of target genes. This DNA-protein architecture for transcription activation appears to be conserved for ComA homologs in other Bacillus species.
PMID: 18585392

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