AttoTector Alkaline Phosphatase Assay Kit is a highly sensitive, simple and direct colorimetric assay designed to measure alkaline phosphatase (ALP) activity.
The kit is a pNPP assay; it uses p-nitrophenyl phosphate (pNPP) as a phosphatase substrate which turns yellow (λmax= 405 nm) when dephosphorylated by ALP.