Human immunodeficiency virus type 1 envelope gene structure and diversity in vivo and after cocultivation in vitro

Kenro Kusumi, Brian Conway, Scott Cunningham, Amy Berson, Christine Evans, Astrid K.N. Iversen, David Colvin, Michael V. Gallo, Steven Coutre, Eugene G. Shpaer, Donald V. Faulkner, Anthony DeRonde, Sarah Volkman, Carolyn Williams, Martin S. Hirsch, James I. Mullins