The inner layer of the procuticle in certain crustaceans and arthropods, which is almost entirely composed of protein and chitin. [ http://purl.obolibrary.org/obo/BTO_0001603 ]
This is just here as a test because I lose it
The inner layer of the procuticle in certain crustaceans and arthropods, which is almost entirely composed of protein and chitin. [ http://purl.obolibrary.org/obo/BTO_0001603 ]