FIG. 2.

Examples of PCR amplification results with locus-specific primers flanking the integrated LTR of the sequences indicated. Numbers in parentheses following GenBank accession numbers refer to the sequence clusters in Fig. 1. Numbers to the left correspond to the comigrating DNA size markers of each primate panel. N, New World monkey; O, Old World monkey; Gi, gibbon; Or, orangutan; G, gorilla; C, chimpanzee; H, human. Expected amplification products were always obtained for DNA with integrated LTRs or without an integrated retroviral sequence. A slightly larger product than expected was observed in the gibbon, using primers flanking sequence AF001550.