Modulated and composite structures dictionary (msCIF) version 1.0.1
A code that links a given atom or rigid-group site to one of the subsystems present in a composite. This code provides an alternative description for composites which is less explicit than that based on linked data blocks (see the description in this dictionary of _audit_link_[ms]). It must match one of the labels specified for _cell_subsystem_code.
Appears in list containing _atom_site_label
Must match data name_cell_subsystem_code