Phosphate Assay Kit (Fluorometric)

Inorganic phosphate (Pi) is one of the most important ions in biological systems. It functions in a variety of roles. One of its most important roles is as a molecular switch, turning enzyme activity on and off through the mediation of the various protein kinases and phosphatases in biological systems. A highly sensitive assay is desired to monitor Pi in a variety of samples. The newly designed and enhanced Phosphate Assay Kit provides a sensitive, easy and quick means of assessing Pi over a wide range of concentrations. In this assay, inorganic phosphate reacts with sucrose to produce glucose-1-phosphate in the presence of a proprietary enzyme. The glucose-1-phosphate is specifically oxidized to generate a product that reacts with the PicoProbe™ to generate fluorescence (Ex/Em = 535/587 nm). The kit can be used to detect Pi produced through reactions involving ATPases, GTPases, 5’-nucleotidase, protein phosphatases, acid and alkaline phosphatases, phosphorylase, etc. from a variety of samples. Unlike other commercially available assays, this assay is not affected by the presence of glucose in samples. This kit can determine phosphate concentrations between 2 µM and 10 µM, with a lower detection limit of approximately 100 pmol.