Ready-to-use ELISA kits are available for the detection of Thymosin alpha 1, an alias of the protein, prothymosin alpha. The official gene symbol is PTMA. The kits can detect several species variants of the protein, including: human, rat, chicken, primate, guinea pig, and other mammalian. The protein, with a mass of 12.2 kDa and length of 111 residues, is reported to be nuclear. It is a member of the Pro/parathymosin family and may be known by other names, including: TMSA, prothymosin-I+/-, prothymosin alpha protein, and gene sequence 28.