The Biosensis proBDNF Rapid enzyme-linked immunosorbent assay (ELISA) Kit is a sandwich ELISA that uses a monoclonal capture antibody to enable the specific, fast and reliable quantification of proBDNF in less than 4 hours in cell culture supernatants, human serum and EDTA-plasma. This proBDNF ELISA kit employs a recombinant, cleavage-resistant human proBDNF standard produced in mammalian cells by Biosensis and validated against externally available proBDNF proteins.