The Ob-R (Phospho-Tyr1141) Colorimetric Cell-Based ELISA Kit provides a lysate-free, convenient, and high-throughput approach for sensitive detection of Ob-R (Phospho-Tyr1141) protein expression profile in cells. The kit can be used for measuring the relative amounts of Ob-R (Phospho-Tyr1141) in cultured cells as well as screening for the effects that various treatments, inhibitors (ie siRNA or chemicals), or activators have on Ob-R (Phospho-Tyr1141).