METTL5 and breast carcinoma: Even though METTL5 is overexpressed in the breast cancer cell lines, it is known to deposit m6A in the 18S ribosomal RNA; and given that m6A levels in mRNA were also higher in MCF7 and MDA-MB-231 cells (Fig. 2B), we aimed to understand the contribution of m6A in mRNA during breast tumorigenesis.