May be part of the rubber biosynthesis machinery. Plays a role in rubber elongation. In solution, able to form amyloid fibers and aggregates rich in beta-sheets (PubMed:24239687). Interaction with membrane stabilizes the protein, inhibiting the amyloid state and aggregation (PubMed:24036080). Tightly bound on latex large rubber particles. Binds first to various type of lipids and then inserts into the membrane as protein rafts. Localized in all laticifer layers. Induced by tapping (PubMed:12461132, PubMed:17632724). Not induced by wounding, ethephon or abscisic acid treatment (PubMed:12461132). Induced by ethephon or ethylene (PubMed:17632724, PubMed:22162870). Not glycosylated. Causes an allergic reaction in human. Involved in latex allergic reactions. Belongs to the REF/SRPP family.