Adenosine diphosphate (ADP) is the product of adenosine triphosphate (ATP) dephosphorylation by ATPases. It is an important intermediate in cellular metabolism as the partially dephosphorylated form of ATP. ADP is 5′-adenylic acid with an additional phosphate group attached through a pyrophosphate bond. Its molecular formula is C10H15N5O10P2 with the molecular weight of 427.201 g/mol. ADP immunoassay is a useful method for screening the activity of kinases and other ATPases. An ADP antibody is a key reagent for ADP immunoassays such as ELISA and TR-FRET. ADP Antibody,mAb,Mouse is produced from the hybridoma resulting from the fusion of SP2/0-Ag14 myeloma and B-lymphocytes harvested from mouse immunized with ADP conjugated to KLH.