Fig. 1
From: Tracing HIV-1 transmission: envelope traits of HIV-1 transmitter and recipient pairs
Linkage of envelope sequences from HIV-1 transmission pairs. Maximum likelihood phylogenetic trees of full-length env sequences from transmitters (red) and recipients (blue). Sequences derived from single genome amplification are displayed with filled circles and those inferred from cloning with open circles. Triangles depict sequences that were used as Env-pseudoviruses for follow-up experiments. Arrows indicate the most recent common ancestors (MRCA). Branch lengths are drawn to scale and HIV-1 HXB2 was used as a subtype B reference. For highlighter plots with all sequences see Additional file 4: Figure S4