May be involved in transcriptional regulation. Shows widespread expression throughout the nucleus, but appears to be excluded from nucleoli. Expressed at peak level in day 12 embryos (PubMed:2574853). Isoform 1: Maternally contributed and highly expressed at the zygotic stage, with rapidly decreasing expression at the two cell stage remaining consistently low through to morula stage (PubMed:20624068). Belongs to the krueppel C2H2-type zinc-finger protein family.