Figure 1.

Expression of protein gp120 in transgenic HIV-1 rats. (A and B) Membrane and intracellular expression of gp120 on white blood cells of HIV-1–transgenic rats (solid bars), as determined by flow cytometry. Percentages of positive cells are shown in A, and mean channel fluorescence (MCF) in B. (C) Levels of gp120 in the bronchoalveolar lavage and serum of transgenic rats as measured by ELISA. Each value in A–C represents the mean ± SEM of four rats. The nonspecific low background levels in the wild-type rats (open bars) were subtracted from the gp120 levels from transgenic rats.