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 (By similarity). Interacts with INCA1; the interaction inhibits INCA1 activity and induces the cell cycle process. Belongs to the krueppel C2H2-type zinc-finger protein family.