There are a number of ELISA Kits available for the measurement of XAnx4, another term for the human protein, annexin A4. Other synonyms may include: 35-beta calcimedin, annexin IV (placental anticoagulant protein II), annexin-4, carbohydrate-binding protein p33/p41, endonexin I, epididymis secretory protein Li 274, and lipocortin IV. It is encoded by the ANXA4 gene to yield a protein 319 amino acids in length and 35.9 kDa in size. However, there are up to 2 reported isoforms. The protein is categorized into the Annexin family. Versions of XAnx4 are present in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.