para-Nitrophenylphosphate (pNPP) is a non-proteinaceous chromogenic substrate for alkaline and acid phosphatases used in ELISA and conventional spectrophotometric assays.
para-Nitrophenylphosphate (pNPP) serves as a color-producing substance for phosphatase enzymes, utilized in enzyme-linked immunosorbent assay (ELISA) and traditional spectroscopic tests.