envelope glycoproteins in virus replication was investigated. Deletion of residues 840 to 856
at the carboxyl terminus of gp41 reduced the efficiency of virus entry during an early step in
the virus life cycle between CD4 binding and formation of the DNA provirus without affecting
envelope glycoprotein synthesis, processing, or syncytium-forming ability. Deletion of
residues amino terminal to residue 846 was associated with decreased stability of envelope …