Data Item _force_constant.units
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General 
- Item name
- _force_constant.units
- Category name
- force_constant
- Attribute name
- units
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
Provide the units for the value entered.
Data Type 
- Data type code
- code
- Data type detail
- code item types/single words ...
- Primitive data type code
- char
- Regular expression
- [_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*
- Values limited by enumeration list
- no
Controlled Vocabulary
| Allowed Value | Details |
|---|---|
| kcal/mol*A2 | bonds; distance; radius of gyration; planarity |
| kcal/mol*A4 | van der Waals |
| kcal/mol*Hz2 | dipolar coupling; scalar couplings; T1/T2; CSA |
| kcal/mol*ppm2 | Chemical shifts; pseudocontact shifts |
| kcal/mol*rad2 | angle or dihedral angle |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| kcal/mol*A2 | bonds; distance; radius of gyration; planarity |
| kcal/mol*A4 | van der Waals |
| kcal/mol*Hz2 | dipolar coupling; scalar couplings; T1/T2; CSA |
| kcal/mol*ppm2 | Chemical shifts; pseudocontact shifts |
| kcal/mol*rad2 | angle or dihedral angle |