Data Item _struct_asym.id
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General 
- Item name
- _struct_asym.id
- Category name
- struct_asym
- Attribute name
- id
- Required in PDB entries
- Used in current PDB entries
- Yes, in about 100.0 % of entries
Item Description
The value of _struct_asym.id must uniquely identify a record in
the STRUCT_ASYM list.
Note that this item need not be a number; it can be any unique
identifier.
Additional Descriptive Information for Depositors
Use this data item corresponds to the chain identifier for each polymer entity.
Item Example1
1
Item Example2
A
Item Example3
2B3
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*|+-]*
Child Data Items 
- _atom_site.label_asym_id
- _pdbx_coordinate_model.asym_id
- _pdbx_struct_asym_gen.asym_id
- _pdbx_unobs_or_zero_occ_atoms.label_asym_id
- _pdbx_unobs_or_zero_occ_residues.label_asym_id
- _rcsb_struct_ncs_virus_gen.asym_id
- _refine_ls_restr_ncs.pdbx_asym_id
- _struct_biol_gen.asym_id
- _struct_ncs_dom_lim.beg_label_asym_id
- _struct_ncs_dom_lim.end_label_asym_id