A component of the identifier for partner 1 of the structure
connection.
This data item is a pointer to _atom_site.label_asym_id in the
ATOM_SITE category.
Additional Descriptive Information for Depositors
A component of the identifier for partner 1 of
the structure connection. This data item is a
pointer to _atom_site.label_asym_id in the ATOM_SITE
category.