Binds to the embryo specification element and the ABA-responsive element (ABRE) of the Dc3 gene promoter. Could participate in abscisic acid-regulated gene expression during seed development. DNA-binding heterodimer with ABI5/DPBF1, DPBF2 or EEL/DPBF4. Interacts with the AFP proteins AFP1, AFP2, AFP3 and AFP4. Predominantly expressed in seeds. Expressed in embryo during the latest stages of seed maturation. Belongs to the bZIP family. ABI5 subfamily.