Pomc gene (ENSRN000000012686) in rats is located on chromosone 6 (www.ensembl.org). It is transcribed into a mRNA (ENSRN000000016976), translated into a peptide that is proteolytically cleaved in a tissue specific manner into biologically-active peptides. This gene gives rise to two classes of peptides; the melanocortins and the endorphins. In the hypothalamus, POMC peptide processing yields primarily α-MSH, a negligeable amount of ACTH and β-EP (NT= N-terminal peptide, JP=Junctional peptide, ACTH= Adrenal corticotrophin thyroid hormone, β-LPH= Beta- lipotrophin hormone, α-MSH= Alpha melanocyte-stimulating hormone, CLIP= Corticotropin-like intermediate peptide, β-EP=Beta- endorphin). A representative figure of β-EP-producing POMC neurons in the arcuate nucleus of the hypothalamus is represented.