Reprinted with permission from Nature 329 (6139): 512–518 (1987). Copyright © 1987 Macmillan Publishers Ltd.
13The Journal of Immunology
14 PILLARS OF IMMUNOLOGY
15The Journal of Immunology
16 PILLARS OF IMMUNOLOGY
17The Journal of Immunology
18 PILLARS OF IMMUNOLOGY
19The Journal of Immunology