Chitin in a Cambrian fossil, Hyolithellus.
D000596:Amino Acids; D055598:Chemical Phenomena; D002621:Chemistry; D002688:Chitinases; D005944:Glucosamine; D066298:In Vitro Techniques; D010163:Paleontology; D011134:Polysaccharides; D011506:Proteins
D000596:Amino Acids; D011134:Polysaccharides; D011506:Proteins; D002688:Chitinases; D005944:Glucosamine