Protachykinin-1

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** Protachykinin-1 (129 aa, ~15 kDa) is encoded by the human TAC1 gene. This protein is involved in neuronal excitation, behavioral responses, and smooth muscle contraction.

**Synonyms:** - PPT - Preprotachykinin - Protachykinin - Protachykinin 1