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    • 1. 发明专利
    • EXPRESSION-CONTROLLING DNA
    • JPH0759575A
    • 1995-03-07
    • JP20646193
    • 1993-08-20
    • MITSUBISHI CORPMITSUBISHI CHEM CORP
    • NAKAJIMA MIDORISHIMAMOTO ISAO
    • A01H5/00C12N5/10C12N15/09
    • PURPOSE:To obtain the subject DNA contained in a 5' upper stream region from the transcription starting point of a waxy gene strongly expressed in the seed of a gramineous plant and capable of being bound to an extraneous gene to improve the ingredients of the seed or produce a substance in the seed. CONSTITUTION:A genomic DNA prepared from the leaf of rice by a conventional method is cleaved with a restriction enzyme, and subsequently ligated with lambda-phage to make a library. The library is subjected to a plaque hybridization using the waxy cDNA of the rice and a positive clone is screened. The positive clone is treated with a restriction enzyme to form reporter vectors successively deleted from the 5'-upper region. The presence or absence of the expressions of the reporter genes are measured to specify an expression- controlling region to obtain the objective expression-controlling DNA having a basic sequence of the formula, etc., contained in a 5'-upper flow region upper by -637 to 275 bases from the transcription-starting point of the rice waxy gene, and capable of being bound to an extraneous gene and introduced in a gramineous plant to improve the ingredients of the seed and produce a substance with the seed.
    • 3. 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.
    • 5. 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.