Used in biomedical research to quantitatively measure Human Protein Tyrosine Phosphatase Receptor Type J (PTPRJ) levels in biological samples such as serum, plasma, and cell lysates. This ELISA kit is particularly valuable in studies related to cell signaling, cancer progression, and immune regulation, as PTPRJ is involved in modulating tyrosine phosphorylation events that influence cell growth and differentiation. Researchers use this kit to assess PTPRJ expression in disease models, evaluate therapeutic responses, and explore its role as a potential tumor suppressor in various cancers. The assay provides a sensitive and specific means to monitor changes in PTPRJ for both basic science and translational research applications.