Expression of hair keratin homologs of Xenopus tropicalis is associated with cornified claws. a Schematic depiction of a clawed frog (X. tropicalis) bearing cornified claws on the hindlimb inner ...

The study revealed that the cornified claws of Xenopus frogs consist of special proteins (keratins) that are very similar to the main components of mammalian hair and nails.