May serve as a biotin provider for several growth-limiting enzymes that are necessary during seed development and the subsequent germination stages, and thus may play some roles in determining seed germination capacity. Expressed in the leaf primodium and the vascular tissues of the hypocotyl-radicle axis of mature seeds. High protein levels in dry and mature soybean seeds, but not found in fresh immature seeds. Belongs to the seed biotin-containing protein SBP65 family.