1. 1. Warren, H. S., Vogel, F. R. & Chedid, L. A. A. Rev. Immun. 4, 369–388 (1986). 2. Chapel, H. M. & August, P. J. Clin. exp. Immun. 24, 538–541 (1976). 3. Schwartz, R. H. A. Rev. Immun. 3, 237–261 (1985). 4. Green, N. M., Adv. Protein Chem. 29, 85–133 (1975). 5. Friedman, A. & Cohen, I. R. Immunogenetics 18, 267–275 (1983). 6. Borel, Y. Immun. Rev. 50, 71–104 (1980). 7. Matis, L. A., Glimcher, L. H., Paul, W. E. & Schwartz, R. H. Proc. natn. Acad. Sci. U.S.A. 80, 6019–6023 (1983). 8. Palacios, R. Proc. natn. Acad. Sci. U.S.A. 82, 6652–6656 (1985). 9. Janeway, C. A. Jr in Strategies of Immune Regulation (eds Sercarz, E. & Cunningham, A. 179–198 (Academic, London, 1983). 10. Leserman, L. Immun. Today 6, 352–355 (1985). 11. Kawamura, H. & Berzofsky, J. A. /. Immun. 136, 58–65 (1986). 12. Liew, F. Y. Clin. exp. Immun. 62, 225–241 (1985). 13. Oi, V. T., Jones, P. P., Coding, J. W., Herzenberg, L. A. & Herzenberg, L. A. Curr. Topics Microbiol. Immun. 81, 115–129 (1978). 14. Yewdell, J. W., Frank, E. & Gerhard, W. J. Immun. 126, 1814–1819 (1981). 15. Ey, P. L., Prowse, S. J. & Jenkin, C. R. Immunochemistry 15, 429–436 (1978). 16. Goding, J. W. Monoclonal Antibodies: Principles and Practice, 230–233 (Academic, London, 1983). 17. Ozato, K., Mayer, N. & Sachs, D. /. Immun. 124, 533–540 (1980). 18. Lamoyi, E. & Nisonoff, A. J. Immun. Meth. 56, 235–243 (1983).