Functions as a transcriptional repressor. Regulates the proliferation and the differentiation of erythroid progenitors. Plays a role in granulocyte differentiation. May also function as an A-kinase-anchoring protein (By similarity). Expressed in the spinal cord of stage 22 embryos. Expressed during neurogenesis in the mantle zone of the spinal cord in domains corresponding to interneurons. Belongs to the CBFA2T family.