Subsequently, we collected DNA mutations of HTR6 found by independent studies of breast cancer using the Cbioportal database (n = 9555) (Figures 9A, C) and revealed that deep deletion (shallow deletion refers to the slight loss of copy number, which can be understood as the original diploid becomes the monoploid (generally defined by the value of log2Ratio). Here, HTR6 is linked to breast carcinoma.