Raf-1 Kinase Cascade Assay Kit by The Life Science business of Merck KGaA, Darmstadt, Germany, operates as MilliporeSigma in the U.S. and Canada
This kit is designed to measure the phosphotransferase activity in a kinase cascade reaction initiated by activated Raf-1. Recombinant unactive MEK1 is the substrate for Raf-1. Once activated by Raf-1, MEK1 can phosphorylate and thereby activate another kit component, recombinant unactive MAP Kinase 2/Erk2. Activation of MAP Kinase 2/Erk2 is determined by phosphorylation of myelin basic protein (MBP), in vitro. Phosphorylation of MBP is detected using [γ-32P]ATP as a phosphate donor.