{"title":"DNA在Mg/聚2,6-吡啶二甲酸膜上的固定和杂交及其PAT基因片段的电化学阻抗谱测定","authors":"焦奎, 杨涛, 杨婕, 冯媛媛","doi":"10.1360/ZB2007-37-1-36","DOIUrl":null,"url":null,"abstract":"以静电吸附法使Mg 2+ 修饰于玻碳电极(GCE)上电聚合的2,6-吡啶二甲酸膜(PDC)上, 制得的Mg/PDC/GCE电极, 成为DNA固定及杂交的良好平台. 应用微分脉冲伏安法和电化学阻抗谱对DNA的固定和杂交进行表征. 以电化学阻抗谱免标记法检测目标DNA比以亚甲基蓝为指示剂的微分脉冲伏安法有更高的灵敏度. 固定于电极表面的DNA探针与互补单链DNA杂交后使电负性的[Fe(CN) 6 ] 3-/4- 的表面电子传递电阻值显著增大, 以此作为检测信号可以高灵敏度地测定目标DNA. 电化学阻抗谱检测转基因植物外源PAT基因片段, 线性范围为1.0×10 -9 ~ 1.0×10 -5 mol/L, 检测限为3.4×10 -10 mol/L.","PeriodicalId":49128,"journal":{"name":"Science in China. Series B, Chemistry","volume":"43 1","pages":"36-42"},"PeriodicalIF":0.0000,"publicationDate":"2007-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"DNA在Mg/聚2,6-吡啶二甲酸膜上的固定和杂交及其PAT基因片段的电化学阻抗谱测定\",\"authors\":\"焦奎, 杨涛, 杨婕, 冯媛媛\",\"doi\":\"10.1360/ZB2007-37-1-36\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"以静电吸附法使Mg 2+ 修饰于玻碳电极(GCE)上电聚合的2,6-吡啶二甲酸膜(PDC)上, 制得的Mg/PDC/GCE电极, 成为DNA固定及杂交的良好平台. 应用微分脉冲伏安法和电化学阻抗谱对DNA的固定和杂交进行表征. 以电化学阻抗谱免标记法检测目标DNA比以亚甲基蓝为指示剂的微分脉冲伏安法有更高的灵敏度. 固定于电极表面的DNA探针与互补单链DNA杂交后使电负性的[Fe(CN) 6 ] 3-/4- 的表面电子传递电阻值显著增大, 以此作为检测信号可以高灵敏度地测定目标DNA. 电化学阻抗谱检测转基因植物外源PAT基因片段, 线性范围为1.0×10 -9 ~ 1.0×10 -5 mol/L, 检测限为3.4×10 -10 mol/L.\",\"PeriodicalId\":49128,\"journal\":{\"name\":\"Science in China. Series B, Chemistry\",\"volume\":\"43 1\",\"pages\":\"36-42\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2007-02-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Science in China. Series B, Chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1360/ZB2007-37-1-36\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science in China. Series B, Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1360/ZB2007-37-1-36","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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