Used in biomedical research to quantitatively measure levels of human cytoplasmic phosphoprotein 1 (also known as stathmin 1 or oncoprotein 18) in cell lysates, tissue extracts, and biological fluids such as serum or plasma. The kit is primarily employed in cancer research, as STMN1 is overexpressed in various malignancies including breast, ovarian, and liver cancers, and its expression correlates with tumor aggressiveness and poor prognosis. It enables researchers to study the role of STMN1 in cell cycle regulation, microtubule dynamics, and response to chemotherapy. The assay supports high-throughput screening and biomarker validation in clinical and preclinical studies.