_Entity.Nstd_linkage
| Description | A flag indicating the presence or absence of non-standard linkages between monomers in the biopolymer. |
| Details: | |
| Parent saveframe | entity |
| Data type | yes_no |
| DB table | Entity |
| DB column | Nstd_linkage |
| DB type | BOOLEAN |
| NULL allowed | yes |
| ADIT-NMR deposition system prompt | A non-standard bond exists in the molecule |