Data Item _pdbx_validate_main_chain_plane.improper_torsion_angle
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General 
- Item name
- _pdbx_validate_main_chain_plane.improper_torsion_angle
- Category name
- pdbx_validate_main_chain_plane
- Attribute name
- improper_torsion_angle
- Required in PDB entries
- yes
- Used in current PDB entries
- Yes, in about 4.5 % of entries
Item Description
The value for the torsion angle C(i-1) - CA(i-1) - N(i) - O(i-1)
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