1. Deisseroth, A. & Dounce, A. L. Physiol. Rev. 50, 319–375 (1970).
2. Schonbaum, G. R. & Chnce, B. in The Enzymes Vol. 13, 3rd edn, Ch. 7 (Academic, New York, 1976).
3. Reid, T. J. III, et al. Proc. natn. Acad. Sci, U.S.A. (submitted).
4. Karpukhina, S. Ya., Barynin, V. V. & Lobanova, G. M. Kristallografiya 20, 680–681 (1975).
5. Vainshtein, B. K. et al. Doklady Akad. Nauk SSSR 246, 220–223 (1979).