The Nubians are an ethnic group originally from northern Sudan, and Southern Egypt now inhabiting East Africa and some parts of Northeast Africa. The Nubian people in Sudan inhabit the region between Wadi Halfa in the north and Aldaba in the south. The main Nubian groups from north to south are the Halfaweyen, Sikut, Mahas, and Danagla. They speak different dialects of the Nubian language.
Somatostatin (also known as growth hormone-inhibiting hormone or somatotropin release-inhibiting factor) is a peptide hormone that regulates the endocrine system and affects neurotransmission and cell proliferation via interaction with G-protein-coupled somatostatin receptors and inhibition of the release of numerous secondary hormones. Somatostatin has two active forms produced by alternative cleavage of a single preproprotein: one of 14 amino acids, the other of 28 amino acids.