Figure 2.

Sequence electropherograms obtained from 8-3' untranslated region showing polymorphisms at nucleotide positions 3742, 3743 and 3777. A-B: Forward strand sequences and arrows indicating nucleotide changes of T→A and G→C. Underlined is the +/-14bp. C-D: Sequences showing a nucleotide change of C→T indicated by arrows. Notably, C3743T sequence variant was observed at a high dissimilarity between mother-child pairs among HIV-1 non-transmitting groups.