There are a number of ELISA Kits available for the measurement of histocompatibility 2, class II antigen A, beta 1, another term for the human protein, major histocompatibility complex, class II, DQ beta 1. Other synonyms may include: HLA class II histocompatibility antigen DQ beta 1 chain, MHC class II DQ beta chain, MHC class II HLA-DQ beta glycoprotein, MHC class II antigen DQB1, CELIAC1, and HLA-DQB. It is encoded by the HLA-DQB1 gene to yield a protein 261 amino acids in length and 30 kDa in size. The protein is categorized into the MHC class II family. Versions of histocompatibility 2, class II antigen A, beta 1 are present in other organisms, including: Mouse, Rat.