Used to measure the activity of GAPDH (glyceraldehyde-3-phosphate dehydrogenase) in human biological samples such as cell lysates, tissue extracts, or serum. This ELISA kit enables researchers to quantify GAPDH levels in studies related to cellular metabolism, apoptosis, and neurodegenerative diseases. It is commonly applied in biomedical research to assess metabolic changes in cancer, diabetes, and neurological disorders. The assay is useful for high-throughput screening and provides a reliable method for monitoring GAPDH as a housekeeping protein or as a marker in oxidative stress and cell death pathways.