PROBLEM TO BE SOLVED: To provide a polypeptide allowed to be localized in an endoplasmic reticulum of a plant when a gene encoding the non-plant polypeptide localized in the endoplasmic reticulum is transduced to a plant, and expressed. SOLUTION: A non-plant enzyme localized in the endoplasmic reticulum is successfully transported to the endoplasmic reticulum and functioned in high efficiency by constructing a chimera gene by fusion with a code region at the N-terminus side of CYP51 family gene. COPYRIGHT: (C)2007,JPO&INPIT