Data Item _pdbx_nmr_chem_shift_ref.atom_group
Browse:
General 
- Item name
- _pdbx_nmr_chem_shift_ref.atom_group
- Category name
- pdbx_nmr_chem_shift_ref
- Attribute name
- atom_group
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
Group of atoms within a molecule whose chemical shift was used as the standard
chemical shift reference for the defined observed nuclei.
Additional Descriptive Information for Depositors
Molecular group used as reference for this nucleus.
Item Example
methyl protons
Data Type 
- Data type code
- line
- Data type detail
- char item types / multi-word items ...
- Primitive data type code
- char
- Regular expression
- [][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*
Controlled Vocabulary
| Allowed Value | Details |
|---|---|
| carbonyl carbon | |
| fluorine | |
| methyl carbon | |
| methyl carbons | |
| methyl protons | |
| methylene carbons | |
| methylene protons | |
| nitrogen | |
| phosphorus | |
| protons |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| carbonyl carbon | |
| fluorine | |
| methyl carbons | |
| methyl protons | |
| methylene carbons | |
| methylene protons | |
| nitrogen | |
| phosphorus | |
| protons |