Publications by authors named "Meng-die Qi"

Andrographolide is a main active ingredient in traditional Chinese medicine Andrographis paniculata,with a variety of pharmacological activity,widely used in clinical practice. However its biosynthetic pathway has not been resolved. Cytochrome P450 reductase provides electrons for CYP450 and plays an important role in the CYP450 catalytic process.

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Protein complexes are involved in the synthesis of multiple secondary metabolites in plants, and their separation is essential to elucidate plant secondary metabolism and improve in vitro catalytic efficiency. In this study, the transgenic hairy roots of CYP76AH1, a key enzyme of tanshinone synthesis pathway, was constructed and the transgenic hairy roots of Danshen overexpressing CYP76AH1 protein were screened by Western blotting and used as a tissue culture material for the subsequent extraction of protein complex in tanshinone synthesis pathway. By optimizing the type and concentration of the detergent in the protein extraction buffer, the buffer containing 0.

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Andrographis paniculata is widely used as medicinal herb in China for a long time and andrographolide is its main medicinal constituent. To investigate the underlying andrographolide biosynthesis mechanisms, RNA-seq for A. paniculata leaves with MeJA treatment was performed.

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Objective: To study the effect of chemical constituents from Glycyrrhiza uralensis induced by exogenous 6-benzylaminopurine( 6-BA) in different growth periods, aim to explore the regulatory network of Glycyrrhiza uralensis.

Methods: The transplants of two-year-old Glycyrrhiza uralensis were subjected to four concentrations of 6-BA( 15,20,50,100 mg / L) at June and July. The content of seven kinds of chemical constituents including glycyrrhizic acid, liquiritin, isoliquiritin, liquiritigenin, isoliquiritigenin, liquiritin apioside,isoliquiritin apioside were determined by HPLC.

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The Ultra-high Performance Liquid Chromatography Quadrupole Time-of-flight Mass Spectrometry(UPLC-Q-TOF-MS)was applied to analyze the chemical components in Lysinotus wilsonii. A Waters ACQUITY UPLC-BEH-C₁₈ S column(2.1 mm×100 mm,1.

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The study is aimed to analyze the chemical components in leaves of Chinese seabuckthorn and Tibetan seabuckthorn qualitatively and compare the differences between them by using ultra performance liquid chromatography coupled with quadrupole-time-of-flight mass spectrometry (UPLC/Q-TOF-MS).The chromatographic separation of the components was achieved ona Waters ACQUITY UPLC-T3 column (2.1 mm×100 mm, 1.

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