Used in research settings to detect and quantify the AFP-L3 isoform, a specific variant of alpha-fetoprotein associated with hepatocellular carcinoma (HCC). The kit enables early detection and monitoring of liver cancer progression, particularly in high-risk patients such as those with chronic hepatitis or cirrhosis. By distinguishing AFP-L3 from other AFP isoforms, it improves specificity in identifying malignant liver conditions compared to total AFP testing. Commonly applied in clinical research, biomarker validation, and epidemiological studies focused on liver disease and cancer diagnostics.