Cell-permeable. A potent, selective and ATP-competitive, inhibitor of BRAF(V600E) kinase with potential antineoplastic activity. PLX-40432 selectively binds to the ATP-binding site of BRAF(V600E) kinase and inhibits its activity, which may result in an inhibition of an over-activated MAPK signaling pathway downstream in BRAF(V600E) kinase-expressing tumor cells and a reduction in tumor cell proliferation.