Expressed in pollen (at protein level). N-glycosylated. Contains fucose monosaccharides in the glycan structure. The measured mass is that of the mature protein. Causes an allergic reaction in human. Natural protein binds to IgE in 32% and 40% of the 57 S.kali pollen-allergic patients tested from the center (Zaragoza) and east coast (Murcia) of Spain, respectively. IgE-binding is decreased when the disulfide bonds are disrupted. Belongs to the Ole e I family.