The component of hemoglobin responsible for binding oxygen, consists of an iron ion that binds oxygen and a porphyrin ring that binds the globin molecules; one molecule binds one molecule of oxygen
The binding of oxygen to the iron molecule causes the hemoglobin molecule to undergo conformational changes that affect the binding of oxygen to other heme sites.
the Iron-holding part of the hemoglobin and myoglobin proteins (about 40% of the Fe in meat, fish and poultry is bound into heme) Hemoglobin: the oxygen-carrying protein of the red blood cells
The component of haemoglobin responsible for binding oxygen, consists of an iron ion that binds oxygen and a porphyrin ring that binds the globin molecules; one molecule binds one molecule of oxygen