Many of the major pollen coat proteins are derived from endoproteolytic cleavage of oleosin-like proteins. Surface of oil bodies. Oleosins exist at a monolayer lipid/water interface (By similarity). The full-length protein is found in the tapetal lipid bodies of immature anthers, the proteolytically cleaved C-terminal product is found on the coats of pollen grains. No expression is detected in other flower organs, siliques or seedlings. Only expressed in early developing buds and anthers, mRNA is first detected in 2-3 mm buds, expression levels peak in 4-5 mm buds and are absent in later stages of development. Belongs to the oleosin family.