Gap size: 15bp     combination occurs in      layer 9      |
  Gap size: 3bp   combination occurs in    layer 9    | motif occurs in layer 9          |
motif occurs in layer 9          | motif occurs in layer 9          |
T | T | T |
| OR |   Gap size: 20bp   combination occurs in    layer 9    |
motif occurs in layer 9          | motif occurs in layer 9          |
T | T |
| OR |   Gap size: 2bp   combination occurs in    layer 9    |
motif occurs in layer 9          | motif occurs in layer 9          |
T | T |
|