1. Klein, J. Science 203, 516–521 (1979).
2. Strominger, J. L. et al. in The Role of the Major Histocompatibility Complex in Immunology (ed. Dorf, M. E.) 115–172 (Garland, New York, 1981).
3. Kaufman, J. F., Andersen, R. L. & Strominger, J. L. J. exp. Med. 152, 37s–53s (1980).
4. Charron, D. J. & McDevitt, H. O. J. exp. Med. 152, 18s–36s (1980).
5. Corte, G., Damiani, G., Calabi, F., Fabbi, M. & Bargellesi, A. Proc. natn. Acad. Sci. U.S.A. 78, 534–538 (1981).