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辣根过氧化物酶标记 Streptavidin

2023-08-19 来源:步旅网


辣根过氧化物酶标记Streptavidin

产品编号 A0303 产品名称 辣根过氧化物酶标记Streptavidin 包装 0.2ml 产品简介:

本辣根过氧化物酶标记Streptavidin (HRP-labeled Streptavidin)也称HRP-Streptavidin、Streptavidin-HRP或辣根过氧化物酶标记链霉亲和素,为进口分装,可以用于生物素(Biotin)标记的抗体、核酸、蛋白或其它生物素标记分子的检测。具体用途包括Western、ELISA、免疫组化或免疫细胞化学、原位杂交、Southern、Northern、EMSA等。

本HRP-Streptavidin用高纯度的Streptavidin和超纯的辣根过氧化物酶交联而成,确保产生最低的本底和最高的灵敏度。本产品的浓度为1mg/ml。

Streptavidin的分子量为66kD,可以高度特异性地和生物素(Biotin)结合。Streptavidin和生物素的亲和常数为Kd=10-15M。Streptavidin是一个4聚体蛋白,可以同时结合4个生物素分子。Streptavidin的中文名为链霉亲和素,从Streptomyces adidinii中纯化获得,和鸡蛋清来源的Avidin(亲和素)在空间结构以及与生物素的亲和力方面具有高度的相似性。和Avidin不同的是,Streptavidin是一种非糖基化蛋白,并且基本不带电荷。Avidin的pI= ~10.5,在中性pH条件下呈碱性。由于Streptavidin和Avidin相比在中性条件下不带电荷,因此Streptavidin的非特异性结合比Avidin低很多,这样检测时的非特异性背景就低很多。因此目前在生物素检测时通常使用Streptavidin替代Avidin。

辣根过氧化物酶即horseradish peroxidase (HRP),可以在Western、EMSA、Southern或Northern等检测时催化ECL类试剂(如ECL、BeyoECL等)产生化学发光,可以在ELISA时催化TMB产生蓝色,也可以在免疫组化、免疫细胞化学或Western blot检测时催化DAB产生棕色沉淀。

本辣根过氧化物酶标记Streptavidin用于各种常规用途的推荐稀释比例参考下表,实际实验操作过程中需根据具体情况适当调节辣根过氧化物酶标记Streptavidin的稀释比例。对于Western,推荐的稀释范围为1:2000-10000。 WB IHC/IC/ISH ELISA Southern/Northern 1:2000-10000 1:200-500 1:2000-10000 1:2000-5000 WB, Western blot; IHC, Immunohistochemistry; IC, Immunocytochemistry; ISH, in situ hybridization. EMSA 1:2000-5000  

本产品如果用于常规的Western检测,以每次检测需10毫升1:2000稀释的本产品计,可以检测40次。

包装清单: 产品编号 A0303 — 产品名称 辣根过氧化物酶标记Streptavidin 说明书 包装 0.2ml 1份 保存条件:

-20℃保存,一年有效。

注意事项:

 

叠氮钠会抑制辣根过氧化物酶的活性,在含有辣根过氧化物酶的溶液中不可加入叠氮钠。 为了您的安全和健康,请穿实验服并戴一次性手套操作。

使用说明:

1.

Western、ELISA、免疫组化或免疫细胞化学、原位杂交、Southern、Northern、EMSA等请参考相关实验步骤进行。起始稀释浓度按照产品简介中推荐的稀释比例进行稀释。

使用本产品的文献:

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Crystal structure of cell adhesion molecule nectin-2/CD112 and its binding to immune receptorDNAM-1/CD226. J Immunol. 2012 Jun 1;188(11):5511-20. 3. P Xiao, X Lv.

Immobilization of Chymotrypsin on Silica Beads Based on High Affinity and Specificity Aptamer and Its Applications.

Analytical Letters,2012,45(10),1264-1273. 4. Tang MR, Wang YX, Guo S, Han SY, Wang D.

CSMD1 exhibits antitumor activity in A375 melanoma cells through activation of the Smad pathway. Apoptosis. 2012 Sep;17(9):927-37. doi: 10.1007/s10495-012-0727-0. 5. Liu H, Zhang S, Lin H, Jia R, Chen Z.

Identification of microRNA-RNA interactions using tethered RNAs and streptavidin aptamers. Biochem Biophys Res Commun. 2012 Jun 8;422(3):405-10. Epub 2012 May 7. 6. Liu J, Qian X, Chen Z, Xu X, Gao F, Zhang S, Zhang R, Qi J, Gao GF, Yan J.

Crystal Structure of Cell Adhesion Molecule Nectin-2/CD112 andts Binding to Immune Receptor DNAM-1/CD226. J Immunol. 2012 Jun 1;188(11):5511-20. doi: 10.4049/jimmunol.1200324. Epub 2012 Apr 30. 7. Bu X, Zhao C, Wang W, Zhang N.

GRIM-19 inhibits the STAT3 signaling pathway and sensitizes gastric cancer cells to radiation. Gene. 2013 Jan 10;512(2):198-205. doi: 10.1016/j.gene.2012.10.057. Epub 2012 Nov 1. 8. Jiang X, Zhu Z, Sun Z, Wang L, Zhou L, Miao H, Zhang Z, Shi F, Zhu C.

The development of an indirect competitive immunomagnetic-proximity ligation assay for small-moleculedetection. Analyst. 2013 Jan 21;138(2):438-42. doi: 10.1039/c2an36447f. 9. Xia P, Gou WF, Zhao S, Zheng HC.

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Scanning Electrochemical Microscopy of DNA Hybridization on DNA Microarrays Enhanced by HRP-ModifiedSiO2 Nanoparticles. Anal Chem. 2013 Jun 18.

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Qualitative and quantitative detection of DNA amplified with HRP-modified SiO2 nanoparticles using scanning electrochemical microscopy. Biosens Bioelectron. 2013 Sep 15;47:373-8. doi: 10.1016/j.bios.2013.03.027. Epub 2013 Mar 25. 14.Han CY, Yue LL, Tai LY, Zhou L, Li XY, Xing GH, Yang XG, Sun MS, Pan WS.

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