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17
CH1012
HEMOGLOBIN III
Transport:
• O2 is involved in
a coordinate bond
to Fe2+.
• If O2 is not present
the coordination
site is occupied by
the water ligand a
monodentate ligand.
Heme centre             His
Hb(H2O)4(aq) + 4O2(g)           Hb(O2)4(aq) 
®
¬
Blue             Red