Description_x000D_ General description_x000D_ Pyruvate kinase (PK) is an enzyme that catalyzes the final step of glycolysis, the transfer of a phosphate group from phospho(enol)pyruvate (PEP) to ADP, yielding one molecule of pyruvate and one molecule of ATP. Pyruvate kinase deficiency, due to defects in pyruvate kinase expression or activity, is the second most common cause of hemolytic anemia._x000D_ The Pyruvate Kinase Activity Assay Kit provides a simple and direct procedure for measuring pyruvate kinase activity in a variety of biological samples. Pyruvate concentration is determined by a coupled enzyme assay, which results in a colorimetric (570 nm)/ fluorometric (λex = 535/λem = 587 nm) product, proportional to the pyruvate present. One unit of pyruvate kinase is the amount of enzyme that will transfer a phosphate group from PEP to ADP to generate 1.0 μmole of pyruvate per minute at 25 °C._x000D_ Application_x000D_ Pyruvate Kinase Activity Assay Kit has been used to determine the activity of pyruvate kinase in samples._x000D_ Suitability_x000D_ Suitable for measuring pyruvate kinase activity in various biological samples such as blood, tissues, and culture cells, etc_x000D_ Principle_x000D_ The Pyruvate Kinase Activity Assay Kit provides a simple and direct procedure for measuring pyruvate kinase activity in a variety of biological samples. Pyruvate concentration is determined by a coupled enzyme assay, which results in a colorimetric (570 nm)/ fluorometric (λex = 535/λem = 587 nm) product, proportional to the pyruvate present. One unit of pyruvate kinase is the amount of enzyme that will transfer a phosphate group from PEP to ADP to generate 1.0 μmole of pyruvate per minute at 25 °C.