Recombinant Human His6-Ubiquitin Mutant K48R Protein, CF Summary
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.
UM-HK48R
| Formulation | Lyophilized from a solution in deionized water |
| 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: Ubiquitin
Ubiquitin is a 76 amino acid (aa) protein that is ubiquitously expressed in all eukaryotic organisms. Ubiquitin is highly conserved with 96% aa sequence identity shared between human and yeast Ubiquitin, and 100% aa sequence identity shared between human and mouse Ubiquitin (1). In mammals, four Ubiquitin genes encode for two Ubiquitin-ribosomal fusion proteins and two poly-Ubiquitin proteins. Cleavage of the Ubiquitin precursors by deubiquitinating enzymes gives rise to identical Ubiquitin monomers each with a predicted molecular weight of 8.6 kDa. Conjugation of Ubiquitin to target proteins involves the formation of an isopeptide bond between the C-terminal glycine residue of Ubiquitin and a lysine residue in the target protein. This process of conjugation, referred to as ubiquitination or ubiquitylation, is a multi-step process that requires three enzymes: a Ubiquitin-activating (E1) enzyme, a Ubiquitin-conjugating (E2) enzyme, and a Ubiquitin ligase (E3). Ubiquitination is classically recognized as a mechanism to target proteins for degradation and as a result, Ubiquitin was originally named ATP-dependent Proteolysis Factor 1 (APF-1) (2,3). In addition to protein degradation, ubiquitination has been shown to mediate a variety of biological processes such as signal transduction, endocytosis, and post-endocytic sorting (4-7).
Mutation of lysine 48 to arginine renders Ubiquitin unable to form poly-Ubiquitin chains via lysine 48 linkages with other Ubiquitin molecules. Ubiquitin K48R can form a Ubiquitin-activating (E1) enzyme-catalyzed active thioester at the C-terminus allowing the molecule to be transferred to the lysines of substrate proteins (monoubiquitination). Ideal for the reduction in poly-Ubiquitin chain length/conjugation rates and for the determination of poly-Ubiquitin chains specificity.
- Sharp, P.M. & W.-H. Li. (1987) Trends Ecol. Evol. 2:328.
- Ciechanover, A. et al. (1980 ) Proc. Natl. Acad. Sci. USA 77:1365.
- Hershko, A. et al. (1980) Proc. Natl. Acad. Sci. USA 77:1783.
- Greene, W. et al. (2012) PLoS Pathog. 8:e1002703.
- Tong, X. et al. (2012) J. Biol. Chem. 287:25280.
- Wei, W. et al. (2004) Nature 428:194.
- Wertz, I.E. et al. (2004) Nature 430:694.
Citation for Recombinant Human His6-Ubiquitin Mutant K48R Protein, CF
R&D Systems personnel manually curate a database that contains references using R&D Systems products.The data collected includes not only links to publications in PubMed,but also provides information about sample types, species, and experimental conditions.
1Citation: Showing 1 - 1
- Substrate Ubiquitination Controls the Unfolding Ability of the ProteasomeJ Biol Chem, 2016;0(0):.Species: Bacteria - E. ColiSample Types: Cell LysatesApplications: Bioassay
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总局关于发布医用磁共振成像系统临床评价等4项医疗器械注册技术审查指导原则的通告（2017年第6号）
2017年01月16日发布http://www.sfda.gov.cn/WS01/CL0087/168596.html
为加强医疗器械产品注册工作的监督和指导，进一步提高注册审查质量，国家食品药品监督管理总局组织制定了《医用磁共振成像系统临床评价技术审查指导原则》《口腔颌面锥形束计算机体层摄影设备注册技术审查指导原则》《体外除颤产品注册技术审查指导原则》《光固化机注册技术审查指导原则》（见附件），现予发布。
特此通告。
附件：1.医用磁共振成像系统临床评价技术审查指导原则
2.口腔颌面锥形束计算机体层摄影设备注册技术审查指导原则
3.体外除颤产品注册技术审查指导原则
4.光固化机注册技术审查指导原则
食品药品监管总局
2017年1月10日
2017年第6号通告附件1.docx
2017年第6号通告附件2.docx
2017年第6号通告附件3.doc
2017年第6号通告附件4.docx
图1 光声成像工程 (a)光声信号激发与探测；(b)光声成像实现过程示意图
光声成像过程可以分为三个部分：信号的产生、信号的接收和信号处理及图像重建（见图1）。由于脉冲激光器具有光声转换效率高的优点，因此通常被作为光声成像研究中产生信号的激励源。脉冲激光器发出的激光束照射在待研究组织样品上，由于组织样品的吸收效应，在样品内部形成了与组织光学参数相关的能量沉积分布。由于激光脉宽很窄（ns）吸收的能量不能在短时间内释放，导致瞬间温度变化，从而通过热弹机制转化为热膨胀。周期性热流使周围的介质热胀冷缩而激发超声波，由于这种超声波信号的特殊产生机理，为了区别于其它的超声信号，通常称为光声信号。利用超声探测器接收光声信号并对采集到的信号进行适当地处理和采用相应的图像重建算法，就能够得到样品内部光能量沉积的分布。当保证入射光的均匀性的前提下，光声重建图像与吸收分布具有一一对应的关系。向左转|向右转
光系统设计难各种光系统都各自特点所像质优化重点全致 没像数或者物理领域种著名课题 希望能帮
请问成像系统工作站请问那家的产品做得比较好以及专业一些呢？
实验室新组建，想咨询一下Camag薄层色谱成像系统的价格及一套显微成像的设备清单与价格。显微成像主要用于中药材的显微鉴别
显微镜是OlympusDP71，弄比例尺的时候出来个“衸”，这是什么鬼啊？如何换算成微米？测量的那个选项我选的是10微米，也只有那个选项可以点。然后倍数选择200，然后他就出来这个200衸，选100倍数是500衸，400倍是200也衸，但长度是200的两倍，**各位大神帮帮忙，要怎样才能换成微米？另外1衸是多少微米？
