Adsorption behaviors of Cu2Zn2SOD on mercury electrodes were studied by the electrostatic capillary curve and the relationship between polarographic ultimate current and height of mercury column in the absence of the ...Adsorption behaviors of Cu2Zn2SOD on mercury electrodes were studied by the electrostatic capillary curve and the relationship between polarographic ultimate current and height of mercury column in the absence of the mediators. The effects of impure and denatured SOD on cyclic voltammogram were investigated, confirming that no denaturation was caused during adsorption on mercury electrodes. Double potential step chronocoulometry has confirmed that SOD adsorption on mercury electrode to be the absorption of monomolecular layer.展开更多
采用cDNA末端快速克隆技术首次克隆了仿刺参铜锌超氧化物歧化酶基因的全长cDNA序列，该基因cDNA全长1500 bp ，其中包含5′-非翻译区长129 bp ，3′-UTR长912 bp ，开放阅读框459 bp ，编码152个氨基酸，预测蛋白分子量为15．47 ku。仿...采用cDNA末端快速克隆技术首次克隆了仿刺参铜锌超氧化物歧化酶基因的全长cDNA序列，该基因cDNA全长1500 bp ，其中包含5′-非翻译区长129 bp ，3′-UTR长912 bp ，开放阅读框459 bp ，编码152个氨基酸，预测蛋白分子量为15．47 ku。仿刺参铜锌超氧化物歧化酶基因 cDNA推导的氨基酸序列具有保守的铜锌超氧化物歧化酶蛋白家族标签序列42 GFHIHQFGDNT52及136 GNAGGRAACGVI147，4个Cu2＋结合位点（His-44，-46，-61，-118）和4个Zn2＋结合位点（His-61，-69，-78，Asp-81），一对二硫键（Cys-55，-144）。氨基酸序列比对结果显示，仿刺参铜锌超氧化物歧化酶与匙胸瘿蜂和烟粉虱相似度最高，为71％。系统进化分析显示仿刺参处于无脊椎动物分支中，与紫海胆位于同一小支上。实时定量 PCR结果显示，铜锌超氧化物歧化酶基因 mRNA在仿刺参肠、体壁、肌肉、呼吸树、体腔细胞和管足中均有表达，在管足中表达量最高。在细菌脂多糖刺激后4～12 h ，体腔细胞中铜锌超氧化物歧化酶基因 mRNA表达量显著下降，表明仿刺参的铜锌超氧化物歧化酶基因对细菌脂多糖刺激有免疫应答。展开更多
文摘Adsorption behaviors of Cu2Zn2SOD on mercury electrodes were studied by the electrostatic capillary curve and the relationship between polarographic ultimate current and height of mercury column in the absence of the mediators. The effects of impure and denatured SOD on cyclic voltammogram were investigated, confirming that no denaturation was caused during adsorption on mercury electrodes. Double potential step chronocoulometry has confirmed that SOD adsorption on mercury electrode to be the absorption of monomolecular layer.
文摘采用cDNA末端快速克隆技术首次克隆了仿刺参铜锌超氧化物歧化酶基因的全长cDNA序列，该基因cDNA全长1500 bp ，其中包含5′-非翻译区长129 bp ，3′-UTR长912 bp ，开放阅读框459 bp ，编码152个氨基酸，预测蛋白分子量为15．47 ku。仿刺参铜锌超氧化物歧化酶基因 cDNA推导的氨基酸序列具有保守的铜锌超氧化物歧化酶蛋白家族标签序列42 GFHIHQFGDNT52及136 GNAGGRAACGVI147，4个Cu2＋结合位点（His-44，-46，-61，-118）和4个Zn2＋结合位点（His-61，-69，-78，Asp-81），一对二硫键（Cys-55，-144）。氨基酸序列比对结果显示，仿刺参铜锌超氧化物歧化酶与匙胸瘿蜂和烟粉虱相似度最高，为71％。系统进化分析显示仿刺参处于无脊椎动物分支中，与紫海胆位于同一小支上。实时定量 PCR结果显示，铜锌超氧化物歧化酶基因 mRNA在仿刺参肠、体壁、肌肉、呼吸树、体腔细胞和管足中均有表达，在管足中表达量最高。在细菌脂多糖刺激后4～12 h ，体腔细胞中铜锌超氧化物歧化酶基因 mRNA表达量显著下降，表明仿刺参的铜锌超氧化物歧化酶基因对细菌脂多糖刺激有免疫应答。
