Transcriptional corepressor which facilitates transcriptional repression via its association with DNA-binding transcription factors and recruitment of other corepressors and histone-modifying enzymes (PubMed:12559562, PubMed:15203199). Via association with PRDM14 is involved in regulation of embryonic stem cell (ESC) pluripotency (PubMed:27281218). Involved in primordial germ cell (PCG) formation. Stabilizes PRDM14 and OCT4 on chromatin in a homooligomerization-dependent manner (By similarity). Can repress the expression of MMP7 in a ZBTB33-dependent manner (PubMed:23251453). May function as a complex with the chimeric protein RUNX1/AML1-CBFA2T1/MTG8 (AML1-MTG8/ETO fusion protein) which is produced in acute myeloid leukemia with the chromosomal translocation t(8;21). May thus be involved in the repression of AML1-dependent transcription and the induction of G-CSF/CSF3-dependent cell growth. May be a tumor suppressor gene candidate involved in myeloid tumors with the deletion of the 20q11 region. Through heteromerization with CBFA2T3/MTG16 may be involved in regulation of the proliferation and the differentiation of erythroid progenitors by repressing the expression of TAL1 target genes (By similarity). Required for the maintenance of the secretory cell lineage in the small intestine. Can inhibit Notch signaling probably by association with RBPJ and may be involved in GFI1-mediated Paneth cell differentiation (By similarity). Homooligomer. Homotetramerization is mediated by nervy homology region 2 (By similarity). Can interact with RUNX1T1/CBFA2T1 and CBFA2T3/MTG16; heterotetramerization between members of the CBFA2T family is proposed (PubMed:12242670, PubMed:14703694, PubMed:16616331). Forms a heterooligomer with the AML1-MTG8/ETO fusion protein (PubMed:9447981). Interacts with PRDM14 (PubMed:27281218). Interacts with RBPJ, GFI1, TCF4. Interacts with TAL1 and CBFA2T3/MTG16; the heteromer with CBFA2T3/MTG16 may function in repression of TAL1 (By similarity). Ubiquitously expressed in fetal and adult tissues. Highly expressed in adult brain, heart, lung, kidney, lymph node, appendix, thymus, testis, uterus, small intestine, prostate and thymus. Nervy homology region 2 (NHR2) mediates homo- and possibly heterotypic oligomerization by forming a four-helix bundle tetrameric structure. A chromosomal aberration involving CBFA2T2 is found in childhood precursor B-cell acute lymphoblastic leukemia (pre-B ALL). Translocation t(9;20)(p13;q11) with PAX5. A chromosomal aberration involving CBFA2T2 is found in acute myeloid leukemia. Translocation t(20;21)(q11;q22) with RUNX1/AML1. Belongs to the CBFA2T family. Extended N-terminus.