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- _8 wasQuotedFrom 16170185 provenance.
- _8 value "The activation of B-Raf by Ras has been less well studied; however, the interacting amino acids in the Ras-Raf interface are identical for B-Raf and C-Raf.129,130 The association of Ras with B-Raf also translocates B-Raf to the cell membrane where it is activated.124 Interestingly, a membrane-free complex of B-Raf and 14-3-3 can be activated in vitro by recombinant Ras. This is in stark contrast to A-Raf and C-Raf, which must undergo a series of phosphorylation reactions on serine and tyrosine residues in the cell membrane and cannot be activated by Ras alone.124,130 Of the Raf isoforms, B-Raf is activated first, and on stimulation by Ras, it heterodimerizes with C-Raf, the significance of which is not known.94" provenance.