Zinc-finger transcription repressor factor (PubMed:15225875, PubMed:23319585). Plays a critical role in maintaining the identity of epithelial lineages by suppressing epithelial-to mesenchymal transition (EMT) mainly through the repression of ZEB1, an EMT inducer (PubMed:24735878, PubMed:24735879). Positively regulates neuronal differentiation (PubMed:16423343, PubMed:23319585). Suppresses cell cycling and terminal differentiation of keratinocytes by directly repressing MYC and NOTCH1 (By similarity). Important for the correct development of primordial germ cells in embryos (PubMed:28059165).