Used to measure phosphoenolpyruvate carboxykinase (PEPCK) enzyme activity in mouse tissue samples such as liver, kidney, or muscle. Commonly applied in metabolic research to study glucose metabolism, gluconeogenesis, and insulin resistance. Helps evaluate the effects of drugs, diets, or genetic modifications on energy metabolism in mouse models. Provides a sensitive and specific quantitative analysis suitable for high-throughput screening in biomedical studies.