Data Item _pdbx_sifts_xref_db_segments.seq_id_start
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General 
- Item name
- _pdbx_sifts_xref_db_segments.seq_id_start
- Category name
- pdbx_sifts_xref_db_segments
- Attribute name
- seq_id_start
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The sequence position in the entity or biological unit described
in the data block at which the segment alignment begins.
This data item is a pointer to _entity_poly_seq.num in the
ENTITY_POLY_SEQ category.
Data Type 
- Data type code
- int
- Data type detail
- int item types are the subset of numbers that are the negative or positive integers.
- Primitive data type code
- numb
- Regular expression
- [+-]?[0-9]+
