Abstract: The present invention relates to pyrrole derivatives and photosensitive film using the same and more particularly, the pyrrole derivatives consist of pyrrole units to allow polymerization chemically and electrochemically and a perylene diimide unit to absorb light so that perylene diimide film can be produced by crosslinking the pyrrole units by irradiation of visible light having wavelengths longer than 500 nm and become insoluble in most solvents. Such perylene diimide films can be widely used in the manufacture of electrical, electronical and optical devices such as photo diodes, solar batteries, liquid crystal displays, and luminescent diodes, etc.

Abstract: The invention relates to a novel polypeptide participating in biotin biosynthesis of plant, a polynucleotide encoding the said polypeptide, a method for inducing plant growth inhibition by suppressing the expression or function of the said polypeptide, resulting in inhibition of biotin biosynthesis, and a method for identifying herbicidal compounds that inhibit the expression or function of the said polypeptide. Biotin biosynthesis is an essential process for the growth of plants, however, the process is not present in both human and animals. Therefore, the compounds suppressing the expression or function of the novel polypeptide that relates to biotin biosynthesis can be effectively used as a new herbicide doing human and animals no harm.