CA ModelServer 0.9.12 1 0 0 0 0 0 0 0 0 0 0 3.7350 8.0750 115.5930 CA 0 2 0 0 0 0 0 0 0 0 0 0 M END > Z7fz0CdFSyhHoP5f0E831A > 2025-07-12 16:08:14 > 0.9.12 > ligand > pdb-bcif > 1xk4 > atom_site > {"label_asym_id":"NA","auth_seq_id":4521} > 11 > 9 > 18 > 341 > 0 > 1 $$$$