A modified colorimetric method for the determination of orthophosphate in the presence of high ATP concentrations.

@article{GonzlezRomo1992AMC,
  title={A modified colorimetric method for the determination of orthophosphate in the presence of high ATP concentrations.},
  author={P Gonz{\'a}lez-Romo and Sobeida S{\'a}nchez-Nieto and Marina Gavilanes-Ru{\'i}z},
  journal={Analytical biochemistry},
  year={1992},
  volume={200 2},
  pages={235-8}
}
We describe a modified colorimetric method that quantitates inorganic phosphate linearly up to 60 nmol, with high stability of the developed color and with a low interference by ATP concentration (up to 30 mM). This method is very suitable for use in ATPase enzymatic assays, especially with enzymes that have low specific activities and (or) high Km values for ATP. 

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