Data items in the CHEM_COMP_CHIR_ATOM category enumerate the atoms bonded to a chiral atom within a chemical component.
loop_ _chem_comp_chir_atom.comp_id _chem_comp_chir_atom.chir_id _chem_comp_chir_atom.atom_id phe 1 N phe 1 C phe 1 CB val 1 N val 1 C val 1 CB # - - - - data truncated for brevity - - - -