this assignment is further supported by the following : ( 1 ) the same model will fit the data for oxy- and co-hemoglobin at all three temperatures ( a 24-29-fold variation in rate constants ) , ( 2 ) evidence from electron microscopy shows hexameric forms , and ( 3 ) methemoglobin is apparently stable as a hexamer at ph 7 .
C0019046
hemoglobin
C0025635
methemoglobin