Used in biomedical research to measure levels of sex hormone binding globulin in rat serum or plasma samples. Helps researchers study endocrine function, hormonal imbalances, and reproductive health in laboratory rats. Commonly applied in studies related to testosterone and estrogen regulation, metabolic disorders, liver function, and the impact of drugs or environmental factors on the hormonal system. Enables quantitative analysis in experiments investigating conditions like polycystic ovary syndrome, infertility, and hormone-dependent diseases in animal models.