1. Williams, C. H., Jr in The Enzymes vol. 13, 3rd edn (ed. Boyer, P. D.) 89–172 (Academic, New York, 1976).
2. Ii, I. & Sakai, I. Biochim. biophys. Acta 350, 151–161 (1974).
3. Brady, P. S., Shelle, J. E. & Ullrey, D. E. Am. J. vet. Res. 38, 1045–1047 (1977).
4. Williams, C. H., Jr in Mechanisms of Oxidizing Enzymes (eds Singer, T. P. & Ondarza, R. N. ) 2–15 (Elsevier, New York, 1978).
5. Schulz, G. E., Zappe, H., Worthington, D. J. & Rosemeyer, M. A. FEBS Lett. 54, 86–88 (1975).