Cornification in the claw of the amphibianXenopus laevis(Pipidae, Anura) and comparison with claws in amniotes

An ultrastructural, immunocytochemical and electrophoretic study on keratinocytes forming the corneous layer of claws in the frog Xenopus laevis has been conducted in order to analyze the process of cornification in amphibians and compare it with cornification in amniote claws. During claw differentiation pre-corneous keratinocytes accumulate dense corneous bundles containing keratin filaments and inter-keratin material. Ribosomes are associated...