NON-STANDARD AND MIXED BASES
| CODE | Description | CODE | Description |
| N | A+c+T+g |
R | A+g |
| Y | c+T |
M | A+c |
| K | T+g |
S | c+g |
| W | A+T |
H | A+T+c |
| B | T+c+g |
D | A+T+g |
| V | A+c+g |
NON STANDARD BASES
| CODE | Description | CODE | Description |
| U | deoxyuracil |
I | deoxyinosine |
Upis ovih baza podrazumjeva se kao modifikacija custom primera.