Orexin B, human-13C18,15N3 (Human orexin B-13C18,15N3) TFA is the 13C- and 15N-labeled Orexin B, human (HY-P1339). Orexin B, human is the agonist for Orexin Receptor, with Kis of 420 nM and 36 nM for OX1 and OX2. Orexin B, human participates in the regulation of appetite, wakefulness, cardiovascular function and neuroendocrine[1].