Data Item _pdbx_nmr_chem_shift_ref.chem_shift_units
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General 
- Item name
- _pdbx_nmr_chem_shift_ref.chem_shift_units
- Category name
- pdbx_nmr_chem_shift_ref
- Attribute name
- chem_shift_units
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
Units for the chemical shift value assigned to the atoms of the chemical
shift reference.
Additional Descriptive Information for Depositors
Units for the chemical shift value assigned to the atoms of the chemical shift reference.
Item Example
ppm
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 |
|---|---|
| Hz | Hertz |
| ppm | parts per million |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| Hz | Hertz |
| ppm | parts per million |