建立一整套适用于研究桑天牛线粒体细胞色素氧化酶I(mtDNA CO I)基因的PCR反应体系,研究不同地理分布的桑天牛遗传多样性。通过L_(16)(4~5)正交组合试验和单因素梯度试验对缓冲液(Mg^(2+))、dNTP、随机引物、TaqDNA聚合酶、模板DNA的浓...建立一整套适用于研究桑天牛线粒体细胞色素氧化酶I(mtDNA CO I)基因的PCR反应体系,研究不同地理分布的桑天牛遗传多样性。通过L_(16)(4~5)正交组合试验和单因素梯度试验对缓冲液(Mg^(2+))、dNTP、随机引物、TaqDNA聚合酶、模板DNA的浓度和退火温度、循环次数等影响PCR扩增的重要因素进行优化。试验结果表明,50μL反应体系及反应程序中各因素优化组合为:缓冲液(含Mg^(2+))0.9mmol/L,dNTP 0.15mmol/L,随机引物0.44μnol/L,TaqDNA聚合酶3.0U,模板DNA75ng;退火温度47℃,循环次数35次。展开更多
目的观察脑缺血再灌对小鼠大脑细胞色素C氧化酶亚基Ⅱ(cytochrome C oxidase subunitⅡ,COⅡ)mRNA表达的影响及淫羊藿苷的作用。方法采用双侧颈总动脉夹闭合并取血降压再灌注的方法建立小鼠脑缺血再灌损伤模型,随机分为正常对照组、模...目的观察脑缺血再灌对小鼠大脑细胞色素C氧化酶亚基Ⅱ(cytochrome C oxidase subunitⅡ,COⅡ)mRNA表达的影响及淫羊藿苷的作用。方法采用双侧颈总动脉夹闭合并取血降压再灌注的方法建立小鼠脑缺血再灌损伤模型,随机分为正常对照组、模型组、淫羊藿苷防治组(100mg/kg i.g.),在不同时间点用半定量RT-PCR法检测各组小鼠大脑COⅡ的mRNA表达。结果在脑缺血再灌后1、24h时模型组COⅡmRNA的量与对照组相比无显著性意义。3h模型组COⅡmR-NA的量显著降低(P<0.01),淫羊藿苷组对COⅡmRNA表达量的降低略有所阻遏,但无显著性意义。72h模型组COⅡmRNA的量明显上升(P<0.01),淫羊藿苷组可以明显阻止其表达量的升高(P<0.05)。在脑缺血再灌后14d COⅡmRNA的量又有所降低(P<0.05),淫羊藿苷组可阻止COⅡmRNA表达量的降低。结论脑缺血再灌可影响COⅡmRNA表达。灌胃给予淫羊藿苷对于维持COⅡ的正常表达有一定的作用,提示可能是其发挥脑保护作用的机制之一。展开更多
The fluorescence quenching spectra of the holo-Cu A and apo-Cu A domain of cytochrome c oxidase from Para coccus versutus by KI were investigated.The results indicated that in solution part of the fluorophore tryptoph...The fluorescence quenching spectra of the holo-Cu A and apo-Cu A domain of cytochrome c oxidase from Para coccus versutus by KI were investigated.The results indicated that in solution part of the fluorophore tryptophanes of the Cu A domain are exposed to the surface of the protein,and others buried inside o f the hydrophobic core.The fluorescence quenching constants of holo-Cu A and apo-Cu A domain protein by KI are1.39and2.24,respectively,which suggested t hat the bi-nuclear copper center[Cu A+1.5 -Cu A+1.5 ]also plays a role on the structural stability of the protein.展开更多
文摘建立一整套适用于研究桑天牛线粒体细胞色素氧化酶I(mtDNA CO I)基因的PCR反应体系,研究不同地理分布的桑天牛遗传多样性。通过L_(16)(4~5)正交组合试验和单因素梯度试验对缓冲液(Mg^(2+))、dNTP、随机引物、TaqDNA聚合酶、模板DNA的浓度和退火温度、循环次数等影响PCR扩增的重要因素进行优化。试验结果表明,50μL反应体系及反应程序中各因素优化组合为:缓冲液(含Mg^(2+))0.9mmol/L,dNTP 0.15mmol/L,随机引物0.44μnol/L,TaqDNA聚合酶3.0U,模板DNA75ng;退火温度47℃,循环次数35次。
文摘The fluorescence quenching spectra of the holo-Cu A and apo-Cu A domain of cytochrome c oxidase from Para coccus versutus by KI were investigated.The results indicated that in solution part of the fluorophore tryptophanes of the Cu A domain are exposed to the surface of the protein,and others buried inside o f the hydrophobic core.The fluorescence quenching constants of holo-Cu A and apo-Cu A domain protein by KI are1.39and2.24,respectively,which suggested t hat the bi-nuclear copper center[Cu A+1.5 -Cu A+1.5 ]also plays a role on the structural stability of the protein.
