Used in biomedical research to quantitatively measure levels of the CDKN1B protein, also known as p27 or Kip1, in rat tissue extracts and biological fluids. This kit is particularly valuable in studies related to cell cycle regulation, cancer progression, and cellular proliferation. Researchers use it to investigate the role of p27 in tumor suppression, as its expression levels are often linked to cell cycle arrest in G1 phase. It is commonly applied in oncology, endocrinology, and pharmacology research, especially when evaluating the impact of drugs or genetic modifications on cell cycle control mechanisms in rat models. The assay helps in understanding diseases involving dysregulated cell division and supports the development of targeted therapies.