ðɪs dʒˈiːn pɹɪdˈeɪts ðə lˈæst kˈɑːmən ˈænsɛstɚɹ ʌv mˈæməlz ænd bˈɜːdz, wˌɪtʃ pɹˈɑːbəbli pˌʊts ɪts ˈɔːɹɪdʒˌɪn æɾ ɐbˌaʊt θɹˈiːhˈʌndɹɪd mˈɑː.
This gene predates the last common ancestor of mammals and birds, which probably puts its origin at about 300 Ma.