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Proviral loads of the preinfecting FIVχ and of the challenge viruses in selected tissues of cats at the ends of the experiments shown in Fig. 6 and 7. (A) FIVPET-challenged cats examined with the M2env- and PETenv-specific assays. (B) FIVM2-challenged cats examined with the M2gag- and PETgag-specific assays. Open bars, FIVχ; closed bars, challenge viruses.
