Reptilian Proteins: Proteins obtained from species of REPTILES.Reptiles: Cold-blooded, air-breathing VERTEBRATES belonging to the class Reptilia, usually covered with external scales or bony plates.Alligators and Crocodiles: Large, long-tailed reptiles, including caimans, of the order Loricata.LizardsBoidae: A family of snakes comprising the boas, anacondas, and pythons. They occupy a variety of habitats through the tropics and subtropics and are arboreal, aquatic or fossorial (burrowing). Some are oviparous, others ovoviviparous. Contrary to popular opinion, they do not crush the bones of their victims: their coils exert enough pressure to stop a prey's breathing, thus suffocating it. There are five subfamilies: Boinae, Bolyerinae, Erycinae, Pythoninae, and Tropidophiinae. (Goin, Goin, and Zug, Introduction to Herpetology, 3d ed, p315-320)TurtlesSnakes: Limbless REPTILES of the suborder Serpentes.Iguanas: Large herbivorous tropical American lizards.Echidna: An oviparous burrowing mammal of the order Monotremata native to Australia, Tasmania, and New Guinea. It has hair mingled with spines on the upper part of the body and is adapted for feeding on ants.Atadenovirus: A genus of ADENOVIRIDAE that comprises viruses of several species of MAMMALS and BIRDS. The type species is Ovine adenovirus D.Orthoreovirus: A genus of the family REOVIRIDAE infecting vertebrates only. Transmission is horizontal and infected species include humans, birds, cattle, monkeys, sheep, swine, baboons, and bats. MAMMALIAN ORTHOREOVIRUS is the type species.Platypus: A small aquatic oviparous mammal of the order Monotremata found in Australia and Tasmania.Biological Evolution: The process of cumulative change over successive generations through which organisms acquire their distinguishing morphological and physiological characteristics.Birds: Warm-blooded VERTEBRATES possessing FEATHERS and belonging to the class Aves.Entamoeba: A genus of ameboid protozoa characterized by the presence of beaded chromatin on the inner surface of the nuclear membrane. Its organisms are parasitic in invertebrates and vertebrates, including humans.Phylogeny: The relationships of groups of organisms as reflected by their genetic makeup.Animals, ZooAmphibians: VERTEBRATES belonging to the class amphibia such as frogs, toads, newts and salamanders that live in a semiaquatic environment.Mammals: Warm-blooded vertebrate animals belonging to the class Mammalia, including all that possess hair and suckle their young.Molecular Sequence Data: Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.