text: Neuropeptides are small proteins used for communication in the nervous system. Neuropeptides represent the most diverse class of signaling molecules. There are 90 known genes that encode human neuropeptide precursors. In invertebrates, there are ~50 known genes encoding neuropeptide precursors. Most neuropeptides bind to G-protein coupled receptors, however some neuropeptides directly gate ion channels or act through kinase receptors.
  * Opioid peptides – a large family of endogenous neuropeptides that are widely distributed throughout the central and peripheral nervous system. Opiate drugs such as heroin and morphine act at the receptors of these neurotransmitters.
  # Endorphins
  # Enkephalins
  # Dynorphins
  * Vasopressin
  * Oxytocin
  * Gastrin
  * Cholecystokinins
  * Somatostatin
  * Cortistatins
  * RF-amides
  * Neuropeptide FF
  * Neuropeptide Y -
  * Pancreatic Polypeptide
  * Peptide YY
  * Prolactin-releasing peptide
  * Calcitonin
  * Adrenomedullin
  * Natriuretic
  * Bombesin-like peptides
  * Endothelin
  * Glucagon
  * Secretin
  * Vasoactive Intestinal Peptide
  * Growth Hormone Releasing Hormone
  * Gastric Inhibitory Peptide
  * Corticotropin Releasing Hormone
  * Urocortin
  * Urotensin
  * Substance P
  * Neuromedins
  * Tensin
  * Kinin
  * Granin
  * Nerve Growth Factor
  * Motilin
  * Ghrelin
  * Galanin
  * Neuropeptide B/W
  * Neurexophilin
  * Insulin
  * Relaxin
  * Agouti-related protein homolog gene
  * Prolactin
  * Apelin
  * Metastasis-suppressor
  * Diazepam-binding inhibitor
  * Cerebellins
  * Leptin
  * Adiponectin
  * Visfatin
  * Resistin
  * Nucleibindin
  * Ubiquitin