The Sodium Potassium ATPase alpha-1 (Phospho-Tyr260) Colorimetric Cell-Based ELISA Kit provides a lysate-free, convenient, and high-throughput approach for sensitive detection of Sodium Potassium ATPase alpha-1 (Phospho-Tyr260) protein expression profile in cells. The kit can be used for measuring the relative amounts of Sodium Potassium ATPase alpha-1 (Phospho-Tyr260) in cultured cells as well as screening for the effects that various treatments, inhibitors (ie siRNA or chemicals), or activators have on Sodium Potassium ATPase alpha-1 (Phospho-Tyr260).