CMTM6 and cancer: To investigate the clinical significance and biological role of CMTM6 in BC, the levels of CMTM6 mRNA transcripts in varying BC cell lines representing different subtypes of clinical BC in the Cancer Cell Line Encyclopedia (CCLE) dataset (https://portals.broadinstitute.org/ccle) were analyzed using the ggplot2 (v3.3.3) package in R (v4.0.3) (Fig. S1).