Interfacial recognition between reconstituted myoglobin having charged binding domain and electron acceptor via electrostatic interaction

Myoglobins reconstituted with synthetic zinc porphyrins having multiple car boxylic acid or alkylamine groups bound to the terminal of peripheral side chains can bind cationic methyl viologen or anionic hexacyanoferrate, respe ctively, via electrostatic interaction, where the distribution of the charg ed amino acid residues on the myoglobin surface has an influence on complex formation between the protein and its partner.