Probable transcription factor involved in seed development (PubMed:21447172, Ref.1, PubMed:29853599). Plays a role in seed morphogenesis by promoting the correct development of endotesta cell layer, which directs the further development of the seed coat, the endosperm, and consequently the embryo (Ref.1, PubMed:29853599). Expressed in flowers and seeds (Ref.1). Expressed in endotesta cell layer of developing seeds (PubMed:28369525). A single amino acid substitution of Arg-197 in cultivar Sultanina (AC F6I457) to Leu-197 in a Sultanina mutant cultivar (AC A0A217EJJ0) is responsible for the production of seedless grape. Extended N-terminus.