_Chem_shift_ref.Atom_group
| Description | Group of atoms within a molecule whose chemical shift was used as the standard chemical shift reference for the defined observed nuclei. |
| Details: | |
| Parent saveframe | chem_shift_reference |
| Data type | line |
| Common values | methyl carbon methyl carbons methylene protons methyl protons nitrogen phosphorus protons |
| DB table | Chem_shift_ref |
| DB column | Atom_group |
| DB type | VARCHAR(127) |
| NULL allowed | no (mandatory) |
| ADIT-NMR deposition system prompt | Atom group |