Data Item _chem_comp_tor.atom_id_4
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General 
- Item name
- _chem_comp_tor.atom_id_4
- Category name
- chem_comp_tor
- Attribute name
- atom_id_4
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The ID of the fourth of the four atoms that define the torsion
angle.
This data item is a pointer to _chem_comp_atom.atom_id in the
CHEM_COMP_ATOM category.
Data Type 
- Data type code
- atcode
- Data type detail
- Character data type for atom names ...
- Primitive data type code
- char
- Regular expression
- [][ _(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*
