FIG. 3.

(A) Copy number determination of ERV-L elements (pol probe) in primates. The arrow indicates the major primate burst (>100 copies). Cm, Cheirogaleus medius; Mm, Microcebus murinus; As, Alovatta seniculus; Sm, Saguinus midas; Mc, Macaca cynomolgus; Pt, Pan troglodytes; Hs, Homo sapiens. (B) Copy number determination of ERV-L elements (pol probe) and ERV-L LTRs (LTR probe) for feral and laboratory mice as well as for two Asian rats. Arrows indicate the proposed dating of the two major bursts and the burst observed in M. pahari (3). Phylogenetic links were established by Sage et al. (22) and Boursot et al. (5). All data are expressed as means ± standard errors of the means (n = 3). n.d., not determined.