Recombinant Human His6-PolyUb WT Chains (2-7,K48-linked), CF Summary
19 kDa (Ub2), 29 kDa (Ub3), 38 kDa (Ub4), 48 kDa (Ub5), 58 kDa (Ub6), and 67 kDa (Ub7)
Product Datasheets
Carrier Free
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins.Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration.The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard.In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
UCH-230
| Formulation | Lyophilized from a solution in deionized water. |
| Reconstitution | Reconstitute atup to 5mg/mL in an aqueous solution. |
| Shipping | The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. |
| Stability & Storage: | Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
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Reconstitution Calculator
Background: Poly-Ubiquitin
Poly-Ubiquitin chains are composed of Ubiquitin monomers that are covalently linked through isopeptide bonds, which typically form between a lysine residue of one Ubiquitin molecule and the C-terminal glycine residue of another Ubiquitin molecule (1). Each human Ubiquitin monomer is 76 amino acids (aa) in length and shares 96% and 100% aa identity with yeast and mouse Ubiquitin, respectively (2). Seven of the 76 aa in Ubiquitin are lysine residues that can participate in poly-Ubiquitin chain formation. Linkage through specific lysine residues is thought to serve as a signal that affects protein degradation, signaling, trafficking, and other cellular processes (3-8).
Linkage specific poly-Ubiquitin chains are used to investigate mechanisms of chain recognition, binding and hydrolysis by the proteasome, deubiquitinating enzymes, E3 ligases or other proteins that contain ubiquitin-associated domains (UBAs) or ubiquitin-interacting motifs (UIMs). Lys48-linked chains are abundant in vivo and act as a universal signal for proteasomal degradation. This product is formed with His6-tagged wild-type human recombinant Ubiquitin and linkage-specific enzymes. This mixture of poly-Ubiquitin chains contains di-Ubiquitin and higher MW species; mono-Ubiquitin has been removed. The His6-tag is convenient for metal chelate affinity purification and immuno-detection using His6-specific antibodies.
- Scheffner, M. et al. (1995) Nature 373:81.
- Sharp, P.M. & W.-H. Li (1987) Trends Ecol. Evol. 2:328.
- Behrends, C. & J.W. Harper (2011) Nat. Struct. Mol. Biol. 18:520.
- Greene, W. et al. (2012) PLoS Pathog. 8:e1002703.
- Henry, A.G. et al. (2012) Dev. Cell 23:519.
- Tong, X. et al. (2012) J. Biol. Chem. 287:25280.
- Wei, W. et al. (2004) Nature 428:194.
- Zhang, J. et al. (2012) J. Biol. Chem. 287:28646.
FAQs
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View all Proteins and Enzyme FAQsReconstitution Buffers
Reconstitution Buffer 1 (PBS)
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你的荧光染料具体是哪一种？你可以通过染色试验来决定是否有效啊？一般荧光染料染色后，都会呈现明亮的颜色，比一般同样颜色要亮的多。只要能染上、只要有亮度，就是没失效。
对不同材料来说不同，绝大多数情况下，发射波长会随着激发波长的偏移而有所偏移。 对于固态物质，主要是因为分子与其它材料形成了π建 对于量子点溶液，激发波长也会显著导致发射光谱的不同。但是不是绝对的，比如对于Alex555分子，发射波长的便宜往往就相对较小，这是由于分子内部的能带结构所决定的。 如果是单纯的回答问题，答案是：有关。
以BD出品的为例，你可以购买现成的或者可以根据你要检测的不同细胞因子和厂家定制bead array。基本原理就是试剂盒含有多种微球，每一种都是两种不同荧光强度组合，所以在流式检测的时候会形成一个矩阵。每种微球上附着有可以识别一种细胞因子的抗体。和样本孵育后，再加入荧光标记的抗不同细胞因子的抗体（同样颜色）。这样，只要微球上结合有细胞因子，这个微球就会有三种荧光了。
前两种荧光来判断是哪种微球（哪种细胞因子），第三种荧光是识别抗体上的，来定量。试剂盒还会提供标准品，用来做标准曲线。
细胞内的蛋白，用荧光标记的单克隆抗体识别后，用流式可以测出每个细胞的相对荧光强度。有一种特异性的微球，可以吸附一系列不同定量分子数的抗体。这种微球吸附同样的荧光抗体，可以做出荧光强度和所吸附抗体分子数量的标准曲线。然后拿细胞检测的荧光强度和这个标准曲线对比，得到细胞内所结合的抗体数。因为单克隆抗体只结合相同的抗原表位，所以可以推算出细胞内蛋白的分子数量了。
解释结果的时候要考虑到抗体的特异性和染色的效果等影响因素。
我做的病毒的普通PCR结果还可以。我现在要做该病毒的定量。用的是ICycler定量PCR仪器。有那位高手能告诉我怎样操作该仪器。
我还要重新设计目的基因片段的因物吗？如果不用重新设计，那我下一步应该为做定量PCR做哪些准备呐？还需要设计参照模板吗？
这种实验的把握性有多大？
大家有什么更好的建议吗？
