Neuropeptides
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Neuropeptides such as Neuropeptide Y, Orexin A, Substance P, Gastrin I and Ghrelin act as signaling molecules in the nervous system and regulate neurotransmission, appetite, pain and emotion.
Orexin A (human, rat, mouse) (HB2937)
Description:Excitatory neuropeptide at orexin OX1/OX2 receptors