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    • 1. 发明授权
    • Method for selecting transformed plant cells using ethionine and cystathionine gamma synthase as the selection agent and marker gene
    • 使用乙硫氨酸和胱硫醚γ合酶作为选择剂和标记基因选择转化的植物细胞的方法
    • US06821781B1
    • 2004-11-23
    • US09936454
    • 2001-09-13
    • Nilgun E. TumerThomas Leustek
    • Nilgun E. TumerThomas Leustek
    • C12N504
    • C12N9/1085C12N9/88C12N15/8209C12N15/821C12N15/8243C12N15/8253
    • Disclosed are transgenic plants having edible portions that produce methional during processing. The plants contain increased methionine levels such that upon processing of the edible portion(s), methional levels are increased and lead to food products that possess improved flavor stability and/or quality. Plants of the Solanaceous family e.g., potato, tomato and eggplant, and other methional-producing plants including maize and soybean, are preferred plants. Several ways of genetically engineering plants to produce increased free Met levels are disclosed, with introduction of a non-native nucleic acid encoding cystathionine gamma synthase (CGS) and tissue-specific expression of an anti-sense S-adenosyl-methionine synthetase being preferred. Also disclosed are methods for selecting transformed plant cells using ethionine and CGS as the selection agent and marker gene respectively.
    • 公开了具有在处理过程中产生化学物质的可食用部分的转基因植物。 植物含有增加的甲硫氨酸水平,使得在加工可食用部分时,甲基水平增加并导致具有改善的风味稳定性和/或质量的食品。 茄科家族的植物,例如马铃薯,番茄和茄子,以及其它包括玉米和大豆在内的产甲植物是优选的植物。 通过引入编码胱硫醚γ合成酶(CGS)的非天然核酸和反义S-腺苷 - 甲硫氨酸合成酶的组织特异性表达,公开了遗传工程植物产生增加的游离Met水平的几种方式。 还公开了分别使用乙硫氨酸和CGS作为选择剂和标记基因选择转化的植物细胞的方法。
    • 10. 发明授权
    • Pap mutants that exhibit anti-viral and/or anti-fungal activity in plants
    • 在植物中表现出抗病毒和/或抗真菌活性的Pap突变体
    • US06627736B1
    • 2003-09-30
    • US09639456
    • 2000-08-15
    • Nilgun E. Tumer
    • Nilgun E. Tumer
    • A01H500
    • C07K14/415C12N15/8282C12N15/8283
    • Disclosed are PAP mutants having reduced phytotoxicity compared to wild-type PAP, and which confer broad spectrum resistance to viruses and/or fungi in plants. One group of PAP mutants is characterized by at least one amino acid substitution in the N-terminus of mature PAP, such as the Glycine 75 residue or the Glutamic acid 97 residue; two groups of additional PAP mutants are characterized by truncations in the N-terminal region of mature PAP and truncations or amino acid substitutions in the C-terminal region of mature PAP, respectively; and a further group are enzymatically inactive which still exhibit anti-fungal properties. Also disclosed are DNA molecules encoding the PAP mutants, mutant PAP DNA constructs, and transgenic seed and plants containing the DNAs. Further disclosed are methods for identifying PAP mutants having reduced phytotoxicity, as well as isolated and purified PAP mutants identified by the method.
    • 公开了与野生型PAP相比具有降低的植物毒性的PAP突变体,并且赋予植物中病毒和/或真菌广谱抗性。 一组PAP突变体的特征在于成熟PAP的N末端至少一个氨基酸取代,如甘氨酸75残基或谷氨酸97残基; 两组额外的PAP突变体的特征在于成熟PAP的N末端区域的截短和成熟PAP的C末端区域的截短或氨基酸取代; 并且另外一组酶是无活性的,其仍然表现出抗真菌性质。 还公开了编码PAP突变体,突变体PAP DNA构建体和含有DNA的转基因种子和植物的DNA分子。 还公开了用于鉴定具有降低的植物毒性的PAP突变体的方法,以及通过该方法鉴定的分离和纯化的PAP突变体的方法。