Figure 5From: Evolution of the HIV-1 envelope glycoproteins with a disulfide bond between gp120 and gp41Replication of the L593Q and Q591L mutant viruses. 5 × 106 MT-2 cells were transfected with 5 μg of the indicated molecular clones and virus spread was monitored for 15 days by CA-p24 ELISA.Back to article page