Provided below are ELISA kits targeting tryptophanyl-tRNA synthetase, a human protein encoded by WARS. This protein is 471 amino acids long, with a mass of 53.2 kDa, and is a member of the Class-I aminoacyl-tRNA synthetase family. 2 isoforms have been identified. This is reported to be a cytoplasmic protein. It is also an enzyme classified as a(n) tryptophan-tRNA ligase. There is a noted implication in Neuronopathy, distal hereditary motor, 9. Other alias names for this protein include: tryptophan--tRNA ligase cytoplasmic, hWRS, interferon-induced protein 53, tryptophan tRNA ligase 1 cytoplasmic, HMN9, IFI53, and IFP53. ELISA kits are available that are reactive to human, mouse, rat, bovine, primate, and other mammalian variants of the target antigen.