Data Item _pdbx_entity_branch_link.atom_id_1
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General 
- Item name
- _pdbx_entity_branch_link.atom_id_1
- Category name
- pdbx_entity_branch_link
- Attribute name
- atom_id_1
- Required in PDB entries
- yes
- Used in current PDB entries
- Yes, in about 5.0 % of entries
Item Description
The atom identifier/name for the first atom making the linkage.
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|^-]*
