Fig. 2.

Evolution of POTE genes. A tentative evolutionary history of POTE genes is summarized. A check mark indicates that a POTE gene fragment mostly similar to the corresponding probe sequence was observed in the given species (chimpanzee, Pan troglodytes; orangutan, Pongo pygmaeus; white-cheeked gibbon, Nomascus leucogenys; rhesus macaque, Macaca mulatta; Hamadryas baboon, Papio hamadryas; and white-tufted-ear marmoset, Callithrix jacchus). It is likely that the sole POTE gene fragment detected in marmoset (indicated by an asterisk) is ancestral to all of the POTE genes in OWMs and apes. The tree and estimated divergence times are given at the left (12).