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BRAF binds CTNNB1 and KRAS. 2 / 2
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"In particular, CTNNB1 mutations were consistently associated with the constitutive activation of the RAF/MEK/ERK pathway by either KRAS (n=4) or BRAF (n=3) concurrent mutations."

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"In particular, CTNNB1 mutations were consistently associated with the constitutive activation of the RAF/MEK/ERK pathway by either KRAS (n=4) or BRAF (n=3) concurrent mutations, in keeping with the notion that CTNNB1 mutations are early events in CRC carcinogenesis. xref Conversely, our data confirm that the occurrence of SMAD4 mutations (2.1%) is a late event. xref In fact, in our study 64.3% of SMAD4 mutations occurred in combination with other alterations."