Biology, Mail Code K14-01, Bristol-Myers Squibb Pharmaceutical Research Institute, P.O. Box 4000, Princeton,. New Jersey 08543-4000, and "Dana Ferber Cancer Institute, 44 Binney Street, Boston, Massachusetts 021 15 .... Mzi-rs I 22/134, 12 ft:24. 6/148 .... We thank Mary Barnstead and Debbie Barnhardt for expert tech-.
