Acts as a transcriptional activator. Promotes cell proliferation by facilitating the cell cycle phase transition from the S to G2/M phase. Involved in both the hemin- and phorbol myristate acetate (PMA)-induced erythroid and megakaryocytic differentiation, respectively. Also plays a role as an inhibitor of cell apoptosis. Interacts with INCA1; the interaction inhibits INCA1 activity and induces the cell cycle process. Ubiquitous. Up-regulated by hemin during erythroid differentiation. Up-regulated by phorbol myristate acetate (PMA) during megakaryocytic differentiation. Up-regulated by the transcriptional activator MEF2A. Belongs to the krueppel C2H2-type zinc-finger protein family. Truncated N-terminus. Truncated N-terminus.