Skip to main content
. 2003 Jul;77(13):7682–7688. doi: 10.1128/JVI.77.13.7682-7688.2003

FIG. 1.

FIG. 1.

SI and NSI virus envelope sequences cluster with subtype C HIV. (a) env (C2-V5) RT-PCR product derived from low-passage-number virus stock was sequenced and aligned with CLUSTAL W. The phylogenetic tree was made from gap-stripped sequences of 529 nt each. Bootstrap values from 100 data sets that have a greater than 90% frequency are indicated on the tree. Boxed samples indicate patients who were not receiving treatment. Filled triangles indicate samples with R5-X4 coreceptor usage, while the open triangle indicates X4 usage only. GenBank accession numbers for subtype C reference sequences are as follows: C.BR.92, U52953; C.BW.96, AF110967; C.IN.95, AF067155; C.ET.86, U46016. The accession numbers for the other reference sequences are given in the figure. (b) TC-03 sequence 1 and sequence 2 and TC-28 sequence 1 and sequence 2 correspond to two distinct yet closely related groups of viruses. env V3 loop sequences from PBMC virus stock and MT2 or SupT1 virus stock were compared to consensus C sequence (Con C).