SI Correction.

This document is a correction to the supporting information for a medical sciences article titled "MEK1 mutations confer resistance to MEK and B-RAF inhibition." The authors acknowledge an error in one of the images in the supporting information, but assure that it does not affect the experiment's results or the overall paper. The corrected version of the supporting information is available online. The article provides detailed information on various aspects of the study, including cell lines, MEK1 expression constructs, mutagenesis screen, sequencing, growth inhibition assays, Western blot analysis, kinase assays, and colony formation assays. The document includes figures and tables presenting the experimental findings. [Extracted from the article]