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. 1978 Mar;75(3):1052-5.
doi: 10.1073/pnas.75.3.1052.

Cooperativity in O2 binding to iron porphyrins

J P Collman, J I Brauman, E Rose, K S Suslick

Cooperativity in O2 binding to iron porphyrins

J P Collman et al. Proc Natl Acad Sci U S A. 1978 Mar.

Abstract

The solid-gas O2 binding equilibrium has been studied for for ferrous "picket fence" porphyrinates with sterically hindered axial imidazoles. Such systems show significant cooperativity in their binding of O2: at low O2 pressures a low O2 affinity form exists, and at high O2 pressures a higher O2 affinity form develops. Direct analogies are drawn to the cooperativity shown in O2 binding by hemoglobin. These model systems mimic hemoglobin quantitatively.

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References

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