The Iron Porphins Hemes

Factors Effecting Specialization of the Function of Iron Porphins. 

How are this diversity of properties, marked degree of specialization, and enhanced activity brought about A few mechanisms are already evident which may in part explain some of these phenomena. 

Attachment of a particular nitrogen-containing group at the fifth co-ordination place may change the properties of the complex not only with respect to the redox potential but also with respect to the selective affinity for attaching a particular group at the sixth co-ordination place (27) e.g., ferrous heme-2 pyridine has a greater aflSnity for CO than 

It is interesting to note here that, although these hemoglobins vary in molecular weight, amino acid composition, immunological properties, crystal structure, solubilities, etc., they all possess the common feature of binding oxygen reversibly to the iron of the porphin. One may surmise from these facts that all of the proteins may have in common on their surfaces 

Hydrogen peroxide decomposition Hydrogen peroxide activation 

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