Provided below are ELISA kits targeting aquaporin 4, a human protein encoded by AQP4. This protein is 323 amino acids long, with a mass of 34.8 kDa, and is a member of the MIP/aquaporin (TC 1.A.8) family. 2 isoforms have been identified. This is reported to be a membrane protein. Glycosylation sites have been reported. Other alias names for this protein include: aquaporin type4, mercurial-insensitive water channel, MIWC, and WCH4. ELISA kits are available that are reactive to human, mouse, rat, bovine, chicken, primate, guinea pig, fish, and other mammalian variants of the target antigen.