Data generated from RNA-Seq was used to validate the MM.1S, OPM-2, and RPMI-8226 cells. Base-calling and variant determination was performed using Illumina’s RTA version 1.17.21.3, and the MAPRSeq bioinformatics pipeline (http://bioinformaticstools.mayo.edu/research/maprseq) as described (23 (link)). Variants were compared to RNA-Seq variants present in the Cancer Cell Line Encyclopedia (portals.broadinstitute.org/ccle; (25 )) utilizing publicly available tools from Galaxy (use.galaxy.org). Known translocations were confirmed using gene fusion predictions resulting from the MAPRSeq pipeline, and also compared against CCLE gene fusion predictions. 3T3-L1 cells were from ATCC (www.atcc.org). 5TGM1 cells have not been validated at this time.