Activated RAF1 complex binds MEK MEK activation Authored: Charalambous, M, 2004-04-29 09:21:24 GENE ONTOLOGYGO:0000186 MEK is phosphorylated and activated by RAF. Reactome Database ID Release 43110049 Reactome, http://www.reactome.org ReactomeREACT_962 Reviewed: Greene, LA, 2007-11-08 15:39:37 RAF phosphorylates MEK PathwayStep3855 PathwayStep3852