Tachykinin-4 (Tac4)

Tachykinins are active peptides which excite neurons, evoke behavioral responses, are potent vasodilators and secretagogues, and contract (directly or indirectly) many smooth muscles. Hemokinin induces plasma extravasation, mast cell degranulation, muscle contraction, salivary secretion and scratching behavior.

Increases sperm motility. Induces potent analgesic effects and might play a role in pain modulation.