Fig. 1From: Molecular linkage tracing of HIV-1 transmission events in seroconcordant couples in Guangxi Province, Southeastern ChinaThe transmission cases involved subtype analysis. Maximum likelihood trees were created with pol (a) and env C2V5 (b) gene regions of HIV-1 sequences from couples, unrelated individuals from local areas, and a selection of reference sequences of subtype A–D, F–H, J, K, CRF01_AE, CRF07_BC, and CRF08_BC (http://hiv-web.lanl.gov/)Back to article page