TY - RPRT TI - Sequential CD4-coreceptor interactions in human immunodeficiency virus type 1 Env function: soluble CD4 activates Env for coreceptor-dependent fusion and reveals blocking activities of antibodies against cryptic conserved epitopes on gp120. AU - K Salzwedel AU - E D Smith AU - B Dey AU - E A Berger PY - 2000 DO - 10.1128/jvi.74.1.326-333.2000 UR - https://pubmed.ncbi.nlm.nih.gov/10590121/ ID - 10590121 ER -