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Amino Acid Sequence

Arg-Ser-Gly-Pro-Pro-Gly-Leu-Gln-Gly-Arg-Leu-Gln-Arg-Leu-Leu-Gln-Ala-Ser-Gly-Asn-His-Ala-Ala-Gly-Ile-Leu-Thr-Met-NH2

Biochem/physiol Actions

Orexin-A and Orexin-B are orexigenicpeptides that mediate their effects via two receptors, the orexin-1 receptor (OX1R) and the orexin-2 receptor (OX2R). Orexins are involved in food intake, obesity regulation, energy homeostasis, and differentiation.

General description

Orexin B consists of an amidated C-terminus and shares 46% sequence identity with orexin-A, mainly in the C-terminal region. Orexin-B is proteolytically cleaved from the precursor prepro-orexin.