The majority of mutations are not expressed in MM patient samples. Mutations identified in the exome sequencing data were classified into 3 groups: mutations with the mutant allele found in the RNA-seq (salmon), those with the mutant allele not found in the RNA-seq despite RNA-seq read coverage of the mutation region (green), and those with no covering RNA-seq reads (blue, “No Expression”). The percentage of each type of mutation within each sample is shown.