In addition to protein‐coding mRNAs, abundant SRSF3 binding sites were detected in noncoding RNAs (ncRNAs) in both mouse embryonic stem (ES) and P19 teratocarcinoma cells (Figs 1A and EV1A; Änkö et al, 2012; Müller‐McNicoll et al, 2016), but the functional relevance of SRSF3 binding to ncRNAs in self‐renewing cells has not been investigated. This evidence concerns the gene SRSF3 and teratocarcinoma.