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The map of the construct pBRGX was generated using the Recombinant HIV-1 Drawing Tool, available from the LANL site (http://www.hiv.lanl.gov/content/sequence/DRAW_CRF/recom_mapper.html). Subtype B′ sequences are shown in red and subtype C sequences are displayed in white. The positions of six breakpoints are expressed as HXB2 coordinates at nt 1322, nt 1563, nt 2824, nt 3138, nt 8881 and nt 8950, respectively.
