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