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Immunofluorescence analyses of MLV and HIV Gag and Env precursor proteins in hippocampus neurons. Cultures with hippocampus neurons were infected with recombinant SFV carrying the genes for HIV Env (a), HIV Gag (b), MLV Env (c), and MLV Gag (panel d). The cultures were incubated for 6 h and stained with anti-HIV Env (a), anti-HIV Gag (b), anti-MLV Env (c), and anti-MLV Gag (d). Arrows, putative axon extensions. Magnification, ×375.
