the heterotropic allosteric effect of atp , the major erythrocytic cofactor in the tuatara , is shown to be correlated with distinct homotropic interactions ( hill 's cooperativity coefficient at half-saturation , n50 , attaining 1.3-1.5 above ph 7.5 ) , and with free energies of heme-heme interaction ( 4.7 kj.mole-1 at ph 7.2 ) which resemble those in other vertebrate hemoglobins that exhibit higher n50 values .
C0014792
erythrocytic
C0019046
hemoglobins