O2 transport in vertebrates
Amount of O2 dissolved is proportional to Po2 of blood (3 ml O2/liter of blood at Po2 of 100 mmHg)
The majority of O2 is bound to hemoglobin
Most vertebrate hemoglobin is tetrameric and capable of binding to four O2 molecules
HbH4+ + 4 O2 <—> Hb(O2)4 + 4 H+
deoxyhemoglobin oxyhemoglobin
Myoglobin is a monomer that stores O2 in muscle cells
Neuroglobin (neurons) and cytoglobin (fibroblasts)