Biotin PEG Aldehyde
Biotin PEG Aldehde (Biotin-PEG-CHO) is one of Nanocs" chemical reactive biotin PEG derivatives that can label N-terminal amines. Aldehyde group is reactive toward amine, hydrazide or oxyamine groups from pH 5-9. Unlike amine reactive succinimidyl ester group (NHS), aldehyde can react with protonated amines at acidic environment (pH ~4), a condition sometimes required for certain site-specific biotinylation reactions.Aldehyde reacts with amine group to form an intermediate Schiff bond. Further reduction with hydride will form a stable C-N bond. Reaction between aldhyde and other groups allows site-specific conjugation and labeling of biotin tag to desired position on targeted molecules. Resulted biotin can recognize and bind to avidin, streptavidin or neutravidin with high affinity. PEG linker between Biotin and aldehyde offers higher water solubility, less steric hindrance and enhanced stability. Compared to other commonly used biotinylation reagents, Nanocs pegylated biotins are water soluble, more stable and easier to use.
Physical Properties:
- Appearance: White/off-whilte solid;
- Solubility: Soluble in water, DMSO, DMF;
- Reacive group: Aldehyde (-CHO);
- Reactive to: N-terminal amine, primary amine, etc.;
- Functional moiety: D-biotin;
- Reactive toward: avidin, streptavidin or neutravidin;
Storage Conditions:
- Store at -20 0C. Desiccate.
Reaction Procedures:
Generally, a 5- to 10-fold molar excess of Biotin PEG aldehyde over the amount of amine-containing molecules (such as protein or antibody) results in sufficient conjugation.
Materials Required:
- Reaction buffer: Amine-free aqueousbuffer, pH5.0~6.5.
- Biotin PEG aldehyde stock solution: 5-10 mg in 1 mL conjugation buffer.
- Washing solution: Distilled water or any aqueous buffer.
Reaction Steps:
Dissolve ready labeling molecules in pegylation buffer. Estimate the concentration of primary amine groups on the targeted materials. AddBiotin PEG aldehyde stock solution to the targeted conjugation materials with the final concentration keep at least 10 mg/mL. Allow mixture agitates at room temperature for 2~4 hrs at room temperature or overnight 4 0C. After reaction, C=N bond can be reduced by sodium borohydride. Conjugate can be purified either by size exclusion chromatography or dialysis.
NanocsInc.是全球领先的PEG修饰剂(PEGderivatives,PEGylation试剂)供应商，拥有种类齐全的PEG衍生物，包括：NHS-PEG，马来酰亚胺PEG，巯基PEG，氨基PEG，叠氮PEG，DSPEPEG，荧光PEG等。为全世界数以百万计的客户提供产品与服务。修饰性PEG可应用于药物输送、医疗设备改造和诊断分析等领域。Nanocs提供从磷脂PEGs到荧光PEGs的多种选择，种类齐全，产品线丰富。
NanocsInc.由一群在化学，生物学和纳米技术方面具有丰富学术背景的科学家于2001年在美国成立。 在过去十年中，Nanocs已发展成为一家全球材料供应商，其客户遍布50多个国家。凭借其在波士顿的中心研发和生产设施，Nanocs还在纽约，上海和新加坡设立了办事处。
自成立以来，Nanocs已发展成为生命科学研究领域的先进企业。在过去的十年中，我们在多个领域为客户提供服务：
- 用于药物开发，配方和临床前试验的制药公司;
- 大学，工业和政府研究实验室;
- 生物医学设备和诊断公司。
Nanocs的产品包括功能化生物聚合物，纳米粒子，标记蛋白质，抗体，酶，肽和核苷酸。我们还提供丰富的阵列反应分子，用于荧光标记，聚集，生物素化和生物共轭。
凭借我们强大的化学和生物学团队，Nanocs还为我们的客户提供化学合成，生物分子标记和结合以及化验开发方面的服务。
美国NANOCS高纯度PEG修饰剂是由美国NANOCS公司生产，国内由蚂蚁淘生物代理。NANOCS公司提供的聚乙二醇衍生物在世界范围能比任何公司更具有多样化，服务成千上万的全球客户。总之，nanocs聚乙二醇产品提供以下优点：
1.无限的选择，多种功能，品种及其齐全。
2.具有多种活性部位所需的反应
3.可以为客户量身定做各种产品
修饰性PEG的用途
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Author：AndrewJ.Hall,MilenaQuaglia,PanagiotisManesiotis,ErsiliaDeLorenzi,andBörjeSellergren
Resource:AnalyticalChemistry,2006,78(24):8362-8367.
Abstract：
Arangeof2-acrylamidopyridines,showingsubtledifferencesinsolutionbindingtowardcarboxylicacids,hasbeeninvestigatedasfunctionalmonomersinmolecularimprinting.ImprintingofN-Z-L-glutamicacidwithonesuchmonomerisshowntobeeffectiveinthecreationofamolecularlyimprintedpolymer(MIP)withrecognitionpropertiesforitstemplateandalsoforlargermoleculescontainingglutamicacidresidues.IncomparisontoaMIPpreparedviaamore"trADItional"approach,thenewpolymericreceptorsexhibitreducednonspecificbinding.Thenewreceptorsarecomparedwithpreviouslyreportedurea-basedreceptorstargetingtheglutamicacidresidueandreceptorstargetingthepteridinesubstructureoffolicacid.
PMID:17165828
免疫组化多聚物法
immunohistochemistry
英[ɪmjʊnəʊhɪstəʊ'kemɪstrɪ]
美[ɪmjʊnoʊhɪstoʊ'kemɪstrɪ]
[词典]免疫组织化学;
[例句]Methods Transmission electron microscope and immunohistochemistry were used.
方法采用透射电镜和免疫组化法。
苏州高分子科学先进材料有限公司
polymer英[ˈpɒlɪmə(r)]美[ˈpɑ:lɪmə(r)]
n.多聚物; [高分子] 聚合物;
[例句]The nature of the polymer is currently a trade secret.
这一聚合物的性质目前是个商业机密。
[其他]复数：polymers
