May play a role in hematopoietic stem/progenitor cell differentiation. May play a role as a DNA binding-dependent transcriptional repressor. Interacts with TRIM28. Isoform 2 is widely expressed. Isoform 3 is only expressed in CD34(+) cells. The KRAB domain mediates interaction with TRIM28. Probable target of nonsense-mediated mRNA decay. The proposed CDS is dubious. Probable target of nonsense-mediated mRNA decay. The proposed CDS is dubious. Isoform produced through aberrant splice sites. Belongs to the krueppel C2H2-type zinc-finger protein family.