Data Item _pdbx_validate_torsion.psi
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General 
- Item name
- _pdbx_validate_torsion.psi
- Category name
- pdbx_validate_torsion
- Attribute name
- psi
- Required in PDB entries
- yes
- Used in current PDB entries
- Yes, in about 92.6 % of entries
Item Description
The Psi value that for the residue that lies outside normal limits
(in combination with the Phi value) with regards to the rammachandran plot
Data Type 
- Data type code
- float
- Data type detail
- float item types are the subset of numbers that are the floating numbers.
- Primitive data type code
- numb
- Regular expression
- -?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?
- Units
- degrees
Allowed Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| -180.0 | 180.0 |