Used in biomedical research to quantify levels of glycogen phosphorylase isozyme MM in rat tissue samples, particularly in studies related to muscle metabolism and exercise physiology. Helps assess muscle damage or stress in experimental models, especially in cardiac and skeletal muscle research. Commonly applied in preclinical studies evaluating metabolic disorders, ischemia, or the effects of pharmaceutical compounds on energy metabolism. Provides a sensitive and specific method for detecting GP-MM release into serum, serving as a biomarker for cellular injury in laboratory settings.