Probable microtubule-associated peroxisomal protein required for chloroplast biogenesis and for the formation of the prolamellar body and prothylakoids in etioplasts. Not involved in peroxisomal metabolism, including mobilization of storage compounds during germination, fatty acid beta-oxydation or photorespiration. Located at discrete small spots potentially associated with the surface of the peroxisome. Expressed in young developing tissues, such as seedlings, roots, flowers, buds and young siliques, and to a lesser extent in mature green tissues. Up-regulated by norflurazon. Embryo lethality. Belongs to the QWRF family.