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Schematic maps of HIV genes expression plasmids. pGag, pEnv, pPol and pTat means the plasmid encoding Gag, Env, Pol and Tat protein, respectively. CMV, human cytomegalovirus (hCMV) immediate/early (IE) promoter; Intron, hCMV IE intronA; BGH pA, bovine growth hormone polyadenylation signal.
