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    • 2. 发明专利
    • ISOLATION OF PROMOTER
    • JPH03164186A
    • 1991-07-16
    • JP30238189
    • 1989-11-21
    • MITSUBISHI CHEM INDMITSUBISHI CORP
    • SHIMAMOTO ISAONAKAJIMA MIDORI
    • C12N15/09C12N15/82
    • PURPOSE:To readily obtain a promoter efficiently manifesting exotic gene within plant cell from genome by introducing marker gene lacking of promoter into protoplast derived from plant and performing special treatment to said transformant cell. CONSTITUTION:At first, protoplast derived from plant and marker gene not containing promoter are suspended in a liquid medium and the marker gene is introduced into the protoplast with applying electric pulse. Next, genome DNA extracted from resultant marker gene-manifesting transformant cell is cut with restricting enzyme not cutting marker gene and said DNA fragment is subjected to self-cyclization, then said cyclic DNA is modified by heat to resolve to single chain. Next, respective 5-terminals of positive chains and negative chains on said heat-modified cyclic DNA are annealed together with primer DNA complementary to said DNA and heat-resistant DNA polymerase is affected to afford DNA having complementary chain. Furthermore, said DNA having complementary chain is amplified and the aimed DNA containing marker gene-manifesting promoter is obtained from said DNA.
    • 8. 发明专利
    • ELIMINATION OF MARKER GENE
    • JPH06276872A
    • 1994-10-04
    • JP7380293
    • 1993-03-31
    • MITSUBISHI CORPMITSUBISHI CHEM IND
    • SHIMAMOTO ISAOKIMURA YUSUKE
    • A01H1/06
    • PURPOSE:To provide a maker gene eliminating method so designed that descendants after the next generation of transformant having an extraneous gene and marker gene respectively derived from foreign plasmid are raised and varieties having the extraneous gene alone are selected to selectively eliminate the marker gene needless for the plant. CONSTITUTION:A protoplast is prepared from a suspension made from callus derived from the fully ripen seeds of a plant (e.g. rice) and incorporated with plural foreign plasmids each having extraneous gene (e.g. stripe virus envelope gene) and marker gene (e.g. hygromycin phosphotransferase gene) respectively derived from foreign plasmid to effect transformation. The resultant transformant plant is cultured to regenerate the plant, and the descendants after the next generation of this regenerated plant are raised and the varieties having the extraneous gene alone to selectively eliminate the extraneous marker gene needless for the plant.