Keratin Keratin Keratin () is one of a family of fibrous structural proteins. It is the key structural material making up hair, horns, claws, hooves, and the outer layer of human skin. Keratin is also the protein that protects epithelial cells from damage or stress. Keratin is extremely insoluble in water and organic solvents. Keratin monomers assemble into bundles to form intermediate filaments, which are tough and form strong unmineralized epidermal appendages found in reptiles, birds, amphibians, and mammals. The only other biological matter known to approximate the toughness of keratinized tissue is chitin. Keratin derives from Greek ' from '
Mr. and Mrs. Is the Name ram into her arms. The two mer-characters who find a treasure trove resemble Buddy and Cookie, but are not actually named. This may be Buddy's first color appearance, but whether it was intended as an official part of his sub-series is in doubt. It is frequently stated that Buddy was featured in 23 animated films. They would be 24 if "Mr. and Mrs. Is the Name" is included. Mr. and Mrs. Is the Name Mr. and Mrs. Is the Name is a 1935 animated "Merrie Melodies" cartoon, starring Buddy and Cookie (as two mer-kids), and is noted to be the