Substance P

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

**Definition:** Substance P (11 aa, ~1 kDa) is encoded by the human TAC1 gene. This protein plays a role in the transmission of pain, gastrointestinal smooth muscle contraction, and the modulation of inflammatory and immune responses.

**Synonyms:** - Arg-Pro-Lys-Pro-Gln-Gln-Phe-Phe-Gly-Leu-Met-NH2