Seed storage protein. The mature protein consists of a small and a large chain linked by disulfide bonds. Expressed in seeds (at protein level). Expressed during seed maturation. Expressed in the maturing seeds 24 days after flowering. Causes an allergic reaction in human. Binds to IgE of patients allergic to sesame seeds (PubMed:12842185, PubMed:12110835, PubMed:15536424). Binds to IgE in 92% of the 24 patients tested (PubMed:12842185). Binds to IgE in 30% of the 20 patients tested (PubMed:12110835). Belongs to the 2S seed storage albumins family.