Used in biomedical research to quantify levels of human aminopeptidase N (APN), also known as CD13, in biological samples such as serum, plasma, cell lysates, and tissue homogenates. This kit is particularly valuable in studies related to cancer, inflammation, and immune regulation, as APN is overexpressed in various tumor types and plays a role in peptide metabolism, antigen processing, and angiogenesis. Researchers use this assay to monitor disease progression, evaluate therapeutic responses, and investigate the role of APN in cellular functions. The ELISA format allows for high sensitivity, specificity, and throughput in detecting soluble or membrane-bound APN.