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Proviral loads of preinfecting viruses and challenge FIVχ in selected tissues of cats at the end of the experiment shown in Fig. 4. (A) FIVPET-preinfected cats examined with the M2env- and PETenv-specific assays. (B) FIVM2-preinfected cats examined with the M2gag- and PETgag-specific assays. Open bars, preinfecting viruses; closed bars, FIVχ.
