Multiple Assemblies exist for SMTL entry 1ird
Crystal Structure of Human Carbonmonoxy-Haemoglobin at 1.25 A Resolution; X-RAY DIFFRACTION 1.25 Å

	SMTL ID 1ird.1 Ligands PROTOPORPHYRIN IX CONTAINING FE; CARBON MONOXIDE Polypeptides Hemoglobin alpha chain Oligo-state monomer
	SMTL ID 1ird.2 Ligands PROTOPORPHYRIN IX CONTAINING FE; CARBON MONOXIDE Polypeptides Hemoglobin beta chain Oligo-state monomer