The sequence position at which the alignment begins in the
entity or biological unit described in the data block.
This data item is a pointer to _entity_poly_seq.num in the
ENTITY_POLY_SEQ category.
Additional Descriptive Information for Depositors
The sequence position at which the alignment begins
in the entity or biological unit described in
the data block. This data item is a pointer to
_entity_poly_seq.num in the ENTITY_POLY_SEQ category.