Figure 4From: Substitutions in the Reverse Transcriptase and Protease Genes of HIV-1 Subtype B in Untreated Individuals and Patients Treated With Antiretroviral Drugs Numbers of nucleotide substitutions in RT and PR in treated individuals, excluding positions responsible for resistance mutations as defined by a IAS-USA consensus panel, October 2003. (Values represent means for each transition between patients ± standard error of the mean.)Back to article page