Recombination is one of several factors contributing to the genetic diversity of HIV-1, which is divided into group M (itself comprising 11 subtypes, A-K) and two other groups named O and N. In the present study, the full-length genome of an HIV-1 isolate obtained from a Greek subject (GR17) infected in the Democratic Republic of the Congo (formerly Zaire) was analyzed to reveal a novel mosaic sequence composed of subtypes A, G, and E and regions of indeterminate classification. In particular, most of pol and tat/vpu, as well as the region encoding intracellular domain of gp41, did not cluster with any of the previously characterized HIV-1 subtypes.
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