There are a number of ELISA Kits available for the measurement of H2-Ma, another term for the human protein, major histocompatibility complex, class II, DM alpha. Other synonyms may include: HLA class II histocompatibility antigen DM alpha chain, MHC class II antigen DMA, class II histocompatibility antigen M alpha chain, really interesting new gene 6 protein, DMA, HLADM, and RING6. It is encoded by the HLA-DMA gene to yield a protein 261 amino acids in length and 29.2 kDa in size. Versions of H2-Ma are present in other organisms, including: Mouse, Rat, Fly, Chicken.