<prompt> The HIV fusion inhibitor, enfuviide, acts at the site of:Gp 120Gp 41P24CXCR4  <response>: ENFUVIIDE: This HIV derived synthetic peptide acts by binding to HIV-1 envelope transmembrane glycoproteingp 41 which is involved in fusion of viral and cellular membranes. ESSENTIALS OF MEDICAL PHARMACOLOGY K.D.TRIPATHI SEVENTH EDITION PAGE NO:811 