We compared the cDNA sequences and amino acid sequences of Chalcone synthase （CHS）, Chalcone isomerase （CH1）, and lsoflavone synthase （IFS） in isoflavone biosynthesis pathway, found that their similarity were no...We compared the cDNA sequences and amino acid sequences of Chalcone synthase （CHS）, Chalcone isomerase （CH1）, and lsoflavone synthase （IFS） in isoflavone biosynthesis pathway, found that their similarity were not always consistent; then we compared the amino acid sequences of CHS, CHI, and IFS, found that the clustering relationship of CHS and CHI were different in 13 kind of species; CHS and IFS were the same or similar in leguminous plants Medicago sativa, Medicago truncatula, Pisum sativum, Pueraria Montana, and Glycine max however disaccording with CHI. We prefer the amino acid sequence for cDNA sequence for evolution analysis, and think that the secondary metabolism mostly attributing to environmental stresses, and the functional genes on secondary metabolism pathway are unsuitable for taxonomy analysis.展开更多
A gold-catalyzed intermolecular reaction of ynamides with 3-indolyl azides via the presumable α-imino gold carbenes has been developed, providing an alternative and efficient way for the synthesis of valuable 3-amino...A gold-catalyzed intermolecular reaction of ynamides with 3-indolyl azides via the presumable α-imino gold carbenes has been developed, providing an alternative and efficient way for the synthesis of valuable 3-amino-β-carbolines in generally good to excellent yields. Importantly, this new protocol involves an unexpected 1,2-alkyl migration pathway.展开更多
文摘英国的《科学文摘》(Science Abs-tracts)是一种历史长,被广泛应用的检索工具。该刊从1968年开始增设的“主题指南:”(Subject Guide)是颇有匠心而又很别致的。作为一种工具性的索引,主题指南本身不具备直接检索科技文献的功能——不显示文摘号,只是对分类途径加以侧应和补充——在主题(标题)词之后罗列相应的分类号,指示或澄清分类途径,为进一步充分利用分类途径提供有利条件。这个主题指南的编制雄辩地证明了:等级体系分类语言与标题词标引语言相互接合、靠拢的必要性和优越性。可以说主题指南就是该刊“分类简表与目次”(Classification and contens)的字顺主题索引。
文摘We compared the cDNA sequences and amino acid sequences of Chalcone synthase （CHS）, Chalcone isomerase （CH1）, and lsoflavone synthase （IFS） in isoflavone biosynthesis pathway, found that their similarity were not always consistent; then we compared the amino acid sequences of CHS, CHI, and IFS, found that the clustering relationship of CHS and CHI were different in 13 kind of species; CHS and IFS were the same or similar in leguminous plants Medicago sativa, Medicago truncatula, Pisum sativum, Pueraria Montana, and Glycine max however disaccording with CHI. We prefer the amino acid sequence for cDNA sequence for evolution analysis, and think that the secondary metabolism mostly attributing to environmental stresses, and the functional genes on secondary metabolism pathway are unsuitable for taxonomy analysis.
基金supported by the National Natural Science Foundation of China (21622204 and 21572186)the Natural Science Foundation of Fujian Province for Distinguished Young Scholars (2015J06003)+1 种基金the President Research Funds from Xiamen University (20720150045)NFFTBS (J1310024)
文摘A gold-catalyzed intermolecular reaction of ynamides with 3-indolyl azides via the presumable α-imino gold carbenes has been developed, providing an alternative and efficient way for the synthesis of valuable 3-amino-β-carbolines in generally good to excellent yields. Importantly, this new protocol involves an unexpected 1,2-alkyl migration pathway.
