Tropomyosin, or Tropomyosin 3, is a human gene encoded by TPM3. It may also be known as: Tropomyosin alpha-3 chain; Tropomyosin-3; Tropomyosin-5; hTM5; Gamma-tropomyosin; CAPM1; HEL-189; HEL-S-82p; NEM1; OK/SW-cl.5; TM-5; TM3; TM30; TM30nm; TM5; TPMsk3; hscp30. The encoded protein has an amino acid length of 285 and a mass of 33.0 kDa. Other isoforms may exist. Tropomyosin is a member of the Tropomyosin family. Homologs of this gene exist in other organisms, including: Rat, Zebrafish, Chicken.