Calcium-binding peroxygenase involved in the degradation of storage lipid in oil bodies. May be involved in the interaction between oil bodies and vacuoles during seed germination (By similarity). RH + ROOH = ROH + ROH. Binds 1 heme b (iron(II)-protoporphyrin IX) group. Homodimer. Expressed in seeds (at protein level) (PubMed:18632804, PubMed:9816677). Not expressed in stem, leaf or root (at protein level) (PubMed:9816677). Expressed during seed maturation (PubMed:10589521, PubMed:9816677, PubMed:21041098). Expression begins at 18 days after flowering (at protein level) (PubMed:9816677). Expressed in maturing seeds 2 weeks after flowering (PubMed:10589521). Decreases gradually after germination (PubMed:21041098). Transmembrane regions are predicted by sequence analysis tools, but these regions probably constitute hydrophobic domains associated to phospholipids. The proline-knot motif may be involved in targeting to lipid bodies. Belongs to the caleosin family.