1. Cuatrecasas, P. in Specificity and Action of Animal, Bacterial and Plant Toxins (ed. Cuatrecasas, P,). Receptors and Recognition (Series B) (Chapman and Hall, London, 1976).
2. Perkins, J. P. in Adv. Cyclic Nucleotide Res. 3, 2 (1973).
3. Lefkowitz, R. J., Limbird, L. E., Mukherjee, C. & Caron, M. G. Biochim. biophys. Acta 457, 1 (1975).
4. Bennett, V., O'Keefe, E. & Cuatrecasas, P. Proc. natn. Acad. Sci. U.S.A. 72, 33 (1976).
5. Helmrich, E. J. M. Zenner, H. P. Pfeuffer, T. & Cori, C. F. in Current Topics in Cellular Regulation (eds Horecker, B. L. & Stadtman, E. R.) 10, 41 (1976).