<unk> , also known as growth hormone-inhibiting hormone (GHIH) or by several other names, is a peptide hormone that regulates the endocrine system and affects neurotransmission and cell proliferation via interaction with G protein-coupled<unk>  receptors and inhibition of the release of numerous secondary hormones.<unk>  inhibits insulin and glucagon secretion.<unk>  has two active forms produced by the alternative cleavage of a single preproprotein: one consisting of 14 amino acids (shown in infobox to right), the other consisting of 28 amino acids. Among the vertebrates, there exist six different<unk>  genes that have been named<unk> 1,<unk> 2,<unk> 3,<unk> 4,<unk> 5 and<unk> 6. Zebrafish have all six. The six different genes, along with the five different<unk>  receptors, allow<unk>  to possess a large range of functions. Humans have only one<unk>  gene,<unk> T.
Somatostatin
Histrelin
Incretin
Bryostatin
Beta-Endorphin
Ghrelin
Nesfatin-1
Growth hormone–releasing hormone