. "Active Raf-1 phosphorylates MEK-1/2 on Serine residues, converting ATP to ADP. The MEK-1/2 kinase is now active."^^ . "Reviewed: Dooms, H, 2011-03-17"^^ . "Authored: Charalambous, M, 2005-01-07 11:17:43"^^ . "Reviewed: Villarino, A, 2011-02-11"^^ . "Edited: Schmidt, EE, 0000-00-00 00:00:00"^^ . . . . . "RAF1 phosphorylates MEK2"^^ . . . . . . . . . . .