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(A) Map of external and internal primers on the FIV genome. Positions are homologous to the FIV-Fca sequence (GenBank accession no. U11820). (B) Approximate pride ranges of the Serengeti lions during the dry season in 1994 (unpublished data). Numbers indicate how many individuals from each pride are included in this study, and letters refer to FIV-Ple subtypes. Pride ranges fluctuate with the seasons and over the years; prides remain discrete for many years.
