Catalysis of the disproportionation of superoxide by metalloporphyrins
The efficiencies of several metalloporphyrin complexes at catalyzing the disproportionation of superoxide have been determined at pH 10 in both carbonate and borate buffer systems. Catalytic rate constants were obtained for the iron(III) and cobalt(III) derivatives of tetrakis(4-N-methylpyridyl) porphine, for tetraphenylporphinesulfonatoferrate(III) and for hemin. In addition, the effects of added bovine serum albumin and imidazole were studied. The order of catalytic efficiency is FeTMpyP ≫ FeTMpyP(Im) ≫ FeTPPS(Im) ≈ FeTPPS ≈ FeTPPS·BSA ≈ Fe(EDTA) ≳ CoTMpyP ≫ hemin(Im) ≳ hemin. © 1979. 2 2 2
Journal of Inorganic Biochemistry
Pasternack, Robert F. and Skowronek, William R., "Catalysis of the disproportionation of superoxide by metalloporphyrins" (1979). Faculty Articles Indexed in Scopus. 2631.