推薦產品
形狀
lyophilized powder
品質等級
比活性
≥1,000 units/mg protein
分子量
39.5 kDa
成份
Protein, ≥70% biuret
儲存溫度
−20°C
基因資訊
Escherichia coli CFT073 ... sodA(1040208) , sodB(1036179) , sodC(1036143)
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一般說明
超氧化物歧化酶是存在于植物、动物和微生物的所有需氧细胞中的一组低分子量金属蛋白。它们通过催化超氧自由基阴离子(O2-)发生歧化反应而生成氧和过氧化氢,阻止其破坏性反应。将3-甘油基丙酸自组装在金电极上,可以有效地促进超氧化物歧化酶的直接电子传递。
應用
大肠杆菌中的超氧化物歧化酶已用于研究中,以确定还原和氧化含铁超氧化物歧化酶的阴离子结合属性,显示不需要酪氨酸 34。大肠杆菌中的超氧化物歧化酶 也已用于研究中,以证明分子动力学模拟和有限的蛋白水解作用是互补且特定的工具,可以识别蛋白质中的柔性位点。
生化/生理作用
催化超氧自由基歧化为过氧化氢和分子氧。在防御细胞对抗氧自由基的毒性作用中起到关键作用。与一氧化氮 (NO) 竞争超氧阴离子(与 NO 反应生成过氧亚硝基阴离子),从而 SOD 促进 NO 的活性。在培养的大鼠卵泡、神经细胞系和转基因小鼠中,SOD 也显示出抑制细胞凋亡的作用。
其他說明
含锰酶
單位定義
在 25℃、pH 7.8 的黄嘌呤氧化酶偶联系统中,1 个单位将抑制细胞色素 c 减少 50%(反应体积 3.0 mL)。黄嘌呤氧化酶浓度应每分钟 产生 0.025±0.005 初始 ΔA 550 。
外觀
含 Tris 缓冲盐
分析報告
关于试验方法请参阅 McCord, J.M. and Fridovich,I., J. Biol. Chem., 244, 6049 (1969)。
分析證明 (COA)
輸入產品批次/批號來搜索 分析證明 (COA)。在產品’s標籤上找到批次和批號,寫有 ‘Lot’或‘Batch’.。
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