THREE LINEAGE LOSSES. “Vitamin C synthesis is also an ancestral trait of mammals and that this trait has been lost in three mammalian lineages: bats, guinea pigs and anthropoid primates. In contrast with teleosts fish species, the genomes of anthropoid primates and guinea pigs still contain sequences similar to GLO gene sequences, although they are highly mutated and do not code for a functional L-gulono-γ-lactone oxidase protein.”
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