FIG. 2.

Schematic representation of nef-LTR deletions of HIV-1 detected from patient SG1 in 2005. (A) Deletions in SG1 provirus. The positions of the PCR primers are indicated by arrows: primers NEF1 and NEF2 were used for the first round, and primers NEF2 and NEF3 were used for the second round. Black boxes represent normal sequences; blank spaces represent deletions. Nucleotide numbering refers to HXB2 sequence positions. The numbers in the blank regions represent the sizes (in base pairs) of the deletions. (B) Deletions detected in viral RNA present in plasma by a single-round PCR using primers NEF1/NEF2.