The effects of the varying concentrations of the polysaccharide, eletrolyte and different pH values and temperature on the viscosity of the exopolysaccharide produced by \%Aphanothece halophytica \%Fremy were analysed...The effects of the varying concentrations of the polysaccharide, eletrolyte and different pH values and temperature on the viscosity of the exopolysaccharide produced by \%Aphanothece halophytica \%Fremy were analysed. The results showed that its intrinsic viscosity is 9.76 dl/g, which provides good stability to salt, pH and temperature.展开更多
文章确立了简便的一步法纯化盐生隐杆藻藻蓝蛋白。经过磷酸缓冲液提取、硫酸铵分步沉淀和DEAE-Sepharose Fast F low柱层析,分离纯化得到盐生隐杆藻藻蓝蛋白,其纯度(A620/A280)达到4.58,最终得率为52.65%。纯化的藻蓝蛋白最大吸收峰为62...文章确立了简便的一步法纯化盐生隐杆藻藻蓝蛋白。经过磷酸缓冲液提取、硫酸铵分步沉淀和DEAE-Sepharose Fast F low柱层析,分离纯化得到盐生隐杆藻藻蓝蛋白,其纯度(A620/A280)达到4.58,最终得率为52.65%。纯化的藻蓝蛋白最大吸收峰为620nm,其室温荧光发射峰为646nm,SDS-PAGE电泳显示其α和β亚基的分子量分别为17218Da和20844Da,分子排阻HPLC测得其分子量为76158Da,表明其在pH 7.2下是以(αβ)2二聚体状态存在于溶液中。稳定性实验表明,黑暗、pH 5~8以及0M^2M NaC l等条件下AH-PC是稳定的。这些实验结果将为开发利用盐生隐杆藻藻蓝蛋白提供参考。展开更多
文摘The effects of the varying concentrations of the polysaccharide, eletrolyte and different pH values and temperature on the viscosity of the exopolysaccharide produced by \%Aphanothece halophytica \%Fremy were analysed. The results showed that its intrinsic viscosity is 9.76 dl/g, which provides good stability to salt, pH and temperature.
文摘文章确立了简便的一步法纯化盐生隐杆藻藻蓝蛋白。经过磷酸缓冲液提取、硫酸铵分步沉淀和DEAE-Sepharose Fast F low柱层析,分离纯化得到盐生隐杆藻藻蓝蛋白,其纯度(A620/A280)达到4.58,最终得率为52.65%。纯化的藻蓝蛋白最大吸收峰为620nm,其室温荧光发射峰为646nm,SDS-PAGE电泳显示其α和β亚基的分子量分别为17218Da和20844Da,分子排阻HPLC测得其分子量为76158Da,表明其在pH 7.2下是以(αβ)2二聚体状态存在于溶液中。稳定性实验表明,黑暗、pH 5~8以及0M^2M NaC l等条件下AH-PC是稳定的。这些实验结果将为开发利用盐生隐杆藻藻蓝蛋白提供参考。