_Chem_comp.Three_letter_code
| Description | For standard polymer components the three-letter code for the component. If there is not a standard three-letter code for this component or if this is a non-polymer component the three-letter code should be given as 'UNK'. This code may be preceded by |
| Details: | |
| Parent saveframe | chem_comp |
| Data type | uchar3 |
| DB table | Chem_comp |
| DB column | Three_letter_code |
| DB type | VARCHAR(15) |
| NULL allowed | yes |