New classes of reagents that attack conserved and chemically reactive zinc fingers in retroviral nucleocapsid proteins: A strategy for rational drug design: W. G. Rice*, C. A. Schaeffer*, J. A. Turpin*, L. Coreff†, R. C. Sowder II†, B. Kane†, J. Bader, L. O. Arthur†, and L. E. Hertterson†: *Laboratory of Antiviral Drug Mechanisms and †AIDS Vaccine Program PRI/DynCorp, NCI-FCRDC, Frederick, MD, USA and Developmental Therapeutics Program, National Cancer Institute, Bettesda, MD USA