Used for quantitative measurement of phosphoenolpyruvate carboxykinase (PEPCK) enzyme activity in human biological samples such as serum, plasma, or cell lysates. This ELISA kit enables researchers to assess PEPCK levels in metabolic studies, particularly in diabetes, gluconeogenesis research, and liver function analysis. It provides a reliable and sensitive method to monitor changes in PEPCK activity under various physiological or pathological conditions, supporting both clinical diagnostics and pharmaceutical development.