U0126 is a MEK1/2 inhibitor that is used to study MEK and related signaling pathways. This inhibitor is selective for both MEK1 and MEK2, two specific types of MEK (MAPK kinases) that are elements of the MAPK/ERK signaling pathway.
The compounds of every Wikipedia article carrying a Chembox or a Drugbox, refreshed daily, with the values their infoboxes give. The pages need JavaScript; the API does not.