Zcchc11 (TUT4) and Zcchc6 (TUT7) modify, through 3′ uridylation, a specific microRNA group that shares a TUTase recognition sequence motif and targets proteins belonging to the Homeobox family in P19 embryonal carcinoma cells from mouse (Thornton et al., 2014). Here, TUT7 is linked to carcinoma.