Ghrelin, GHRL gene, obestatin prepropeptide or lenomorelin from ghrelinergic cells in the gastrointestinal tract. GHRL is a neuropeptide in the central nervous system regulating appetite. Ghrelin is regulating the distribution and rate of use of body energy.
Rats are used to make rat monoclonal anti mouse antibodies. There are less rat- than mouse clones however. Rats genes from rodents of the genus Rattus norvegicus are often studied in vivo as a model of human genes in Sprague-Dawley or Wistar rats.