食品科学 ›› 2002, Vol. 23 ›› Issue (7): 118-120.

• 分析检测 • 上一篇    下一篇

发酵大豆食品中染料木素含量的ELISA测定

 吴定, 路桂红   

  1. 南京经济学院食品科学与工程系
  • 出版日期:2002-07-15 发布日期:2011-12-31

ELISA Study on Genistein Content in Fermented Soybean Food

 WU  Ding, LU  Gui-Hong   

  • Online:2002-07-15 Published:2011-12-31

摘要: 染料木素是大豆发酵食品中的主要异黄酮成分。制备了牛血清白蛋白-染料木素免疫抗原和卵白蛋白-染料木素包被抗原,并对它们进行紫外和SDS-聚丙稀酰胺凝胶电泳鉴定。抗染料木素抗体的效价为1:1600。建立竞争ELISA测定发酵大豆制品中染料木素含量方法,染料木素测定浓度范围为6.25~150μg/L;回收率为87%~102%;亲和常数为1.62×108;与大豆甙元、芒柄花素的交叉反应率分别为9.8%、4.57%;与槲皮素、儿茶素、单宁和核黄素等结构类似物无交叉反应。同时将ELISA法与薄层层析法进行比较。

关键词: 染料木素, 酶联免疫吸附测定, 发酵大豆制品

Abstract: Genistein was the main component of i soflavone in the fermented soybean f ood.The immune antigen of BSA -genistein andthe coatedantigenof OA -genistein were synthesizedr espectively,andidentified with ul traviolet absorptionspectrometryandSDS -polyacrylamidegelelectrophoresis.TheantibodyIgGofantigenisteinwa spuredwith saturatedsolutionof(NH 4 ) 2 SO 4 andthe columnchromatography ofSep hadex G -25,with1:1600titer ofanti body IgG of antigenistein.The competitive ELISAfor detecting the genistein con tent in the fermented soybean food wa s devel-oped,with6.25~150μg /Lofthedetectingconcentrationr angeofgenistein,therecoveryof87%~102%,theaffinity constant of 1.62×10 8 ,and the 9.8%and 4.57%cross reactio n ratios of antibody for daidzin and f ormononetin re-spectively,while no cross reaction for catechin,tannin,quercetin and riboflavin was observed.The ELISAmethodand thin -leaver chromatography method were also compared for the effect of assaying genistein.

Key words: Genistein , Enzyme -linkedimmunosorbent assay , The fermented soybeanfood