The cow genome, which diverged from that of the human 80-100 MYA, has 20 annotated ALDH entries which, again, closely parallel human members. Variations include two gene duplications and one possible deletion. Both avian genomes currently lack orthologous entries for ALDH1A1, ALDH1B1, ALDH1L1, ALDH3A1, ALDH3B2 and ALDH16A1. Moreover, the zebra finch genome is also missing annotated sequences for ALDH18A1 and includes two apparent gene duplications.
