1. For general reviews on heme peroxidases, see: (a) InHandbook ofMetalloproteins; Messerschmidt, A., Huber, R., Poulos, T. L., Wieghardt, K., Eds.; John-Wiley and Sons: NY, 2001, Vol. 1, pp 193−328. (b) Poulos, T. L. Peroxidases and Cytochrome P450. InThe Porphyrin Handbook; Kadish, K. M., Smith, K. M., Guilard, R., Eds.; Academic Press: 2000; Vol. 4, Chapter 32, pp 189−218. (c) Dawson, J. H.Science1988,240, 433−439. (d) Dawson, J. H.; Sono, M.Chem. Rev.1987,87, 1255−1276. (e) Marnett, L. J.; Kennedy, T. A. Comparison of Peroxidase Activity of Hemoprotein and Cytochrome P450. InCytochromeP450: Structure, Mechanisms and Biochemistry, 2nd ed.; Ortiz de Montellano, P. R., Ed.; Plenum Press: NY, 1995; pp 49−80. (f) Poulos, T. L., Cupp-Vickery, J., Li, H. Structural Studies on Prokaryotic Cytochromes P450. InCytochrome P450: Structure, Mechanisms andBiochemistry,2nd ed.; Ortiz de Montellano, P. R., Ed.; Plenum Press: New York, 1995; Chapter 4, pp 125−150. (g) Meunier, B. Models of Heme Peroxidases and Catalases. InBiomimetic Oxidations Catalyzed byTransition Metal Complexes; Meunier, B., Ed.; Imperial College Press: UK, 2000; Chapter 4, pp 171−214. (h) Meunier, B.Chem. Rev.1992,92, 1411−1456. (i) Watanabe, Y. High-Valent Intermediates. InThe PorphyrinHandbook; Kadish, K. M., Smith, K. M., Guilard, R., Eds.; Academic Press: 2000; Vol. 4, Chapter 30, pp 97−118. (j) Poulos, T. L.J. Biol. Inorg. Chem.1996,1, 356−359.
2. (b) For the controversy of Wiltstäter (who purified HRP and was familiar with heme chemistry) and Sumner (who crystallized jack bean urease) on whether the catalytic effect of the enzyme is an intrinsic property of the protein or a property of trace inorganic contaminant, see pages 4−5 in ref 1.