总胆汁酸（total bile acids,TBA）是胆固醇在肝脏内分解以及在肠肝循环中的一组代谢产物。其中胆酸、鹅脱氧胆酸为初级胆汁酸,二次代谢产物脱氧胆酸、石胆酸、熊脱氧胆酸为二级胆汁酸,总称为总胆汁酸（TBA）,其生成与代谢物浓度变化能...总胆汁酸（total bile acids,TBA）是胆固醇在肝脏内分解以及在肠肝循环中的一组代谢产物。其中胆酸、鹅脱氧胆酸为初级胆汁酸,二次代谢产物脱氧胆酸、石胆酸、熊脱氧胆酸为二级胆汁酸,总称为总胆汁酸（TBA）,其生成与代谢物浓度变化能灵敏反映肝功能变化。当肝细胞发生病变或患胆管疾病时可引起胆汁的代谢障碍,展开更多
[ Objective] The study was to investigate the volatile components of secondary metabolites from M. alpine producing arachidonic acid and explore the changes in its metabolic pathway. [ Method] The air above M. alpine ...[ Objective] The study was to investigate the volatile components of secondary metabolites from M. alpine producing arachidonic acid and explore the changes in its metabolic pathway. [ Method] The air above M. alpine broth was extracted by solid-phase microextraction（SPME） during the post-exponential phase of growth and analyzed by GC-MS. [Result] 13 compounds were identified, 12 of which were sesquiterpenes with C15H24 formula and accounting for 99.62% of the complete compounds. Thujopsene-（ 12）, α-Guaiene and Aristolene were three most sesquiterpenes accounting for 10.66%, 33.69% and 34.85% of total content respectively. It can be sufficiently certified that sesquiterpene metabolic pathway existing in M. alpine. [ Coclusion] Metabolic flux of sesquiterpene pathway increased to improve its mass accumulation, because one or several key enzyme genes mutation in isoprene or sesquiterpene pathway enhanced their activities during induction of mutation from initial strain.展开更多
文摘总胆汁酸（total bile acids,TBA）是胆固醇在肝脏内分解以及在肠肝循环中的一组代谢产物。其中胆酸、鹅脱氧胆酸为初级胆汁酸,二次代谢产物脱氧胆酸、石胆酸、熊脱氧胆酸为二级胆汁酸,总称为总胆汁酸（TBA）,其生成与代谢物浓度变化能灵敏反映肝功能变化。当肝细胞发生病变或患胆管疾病时可引起胆汁的代谢障碍,
基金Supported by the National Natural Science Foundation of China(20606018)the National Basic Research Program (also called 973Program)(2007CB707805)the Six Projects Sponsoring Talent Summits of Jiangsu Province~~
文摘[ Objective] The study was to investigate the volatile components of secondary metabolites from M. alpine producing arachidonic acid and explore the changes in its metabolic pathway. [ Method] The air above M. alpine broth was extracted by solid-phase microextraction（SPME） during the post-exponential phase of growth and analyzed by GC-MS. [Result] 13 compounds were identified, 12 of which were sesquiterpenes with C15H24 formula and accounting for 99.62% of the complete compounds. Thujopsene-（ 12）, α-Guaiene and Aristolene were three most sesquiterpenes accounting for 10.66%, 33.69% and 34.85% of total content respectively. It can be sufficiently certified that sesquiterpene metabolic pathway existing in M. alpine. [ Coclusion] Metabolic flux of sesquiterpene pathway increased to improve its mass accumulation, because one or several key enzyme genes mutation in isoprene or sesquiterpene pathway enhanced their activities during induction of mutation from initial strain.
