Resonance Raman studies of heme axial ligation in H93G myoglobin

The resonant Raman active mode identified in numerous studies as the heme iron-histidine stretch in the Raman spectrum of 15 exogenous ligands to the heme iron in the myoglobin proximal cavity mutant H93g is investigated. It is seen that Raman bands attributed to in-plane modes of the heme are unaffected by the change in heme-iron ligation.