Mammalian a. : Of or pertaining to the Mammalia or mammals.

Example:
What are the two common amino acids found in Mammalian proteins?

Taxonomy
mammals, Clade, mammalian, Infraclass, monotremes, marsupials, bones, placentals, therapsids, limbs, placental mammals, synapsids, lung, reptiles, fossils, mammal species, animals, Subclass.

Defination from the web:
mammalian brain regulates endothermic and circulatory systems, including a four-chambered heart. ... Most reptiles including lizards, crocodilians, dinosaurs (and their descendants the birds) use this system, as did non-mammalian synapsids such as therapsids. ...