Name | 101Bio Ponceau S Stain | ||||||
Cat. # | P5W4 How to pay with Also can buy from : | ||||||
Application | This product can rapidly stain reversible Western Blot membrane for locating protein bands and comparing the protein bands intensity. This product is for research use only. | ||||||
Product Size | 250 ml | ||||||
Description | 101Bio Ponceau S Stain can rapid and reversible stain Western Blot membrane for locating protein bands and comparing the protein bands intensity. It produces pink reddish stained bands on Western blot membranes. The stain is very useful because it does not have a deleterious effect on the property of proteins. It is also a common method for locating polypeptides on Western blots for protein sequencing. The stain binds to proteins on the membrane reversibly and works well for nitrocellulose and PVDF membranes. It is not recommended for positively charged membranes such as nylon membrane.
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Shipping / Storage | Ship and store at room temperature. | ||||||
Shelf Life | 24 months | ||||||
Manual (protocol) | 101Bio.com Ponceau S Stain | ||||||
Components |
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Name | Cat. # | Size | ||
---|---|---|---|---|
101Bio HRP Substrate Kit | P5W1 | 30 ml /30 ml | ||
101Bio Antibody Enhancer | P5W2 | 30 ml | ||
101Bio WB Stripping Solution | P5W3 | 250 ml | ||
101Bio Ponceau S Stain | P5W4 | 250 ml | ||
101Bio Peroxidase Suppressor | P5W5 | 30 ml | ||
101Bio High Efficiency Protein Precipitation kit | P5W6 | 30 ml /30 ml | ||
101Bio Red Blood Cell Lysis Buffer | P5W7 | 250 ml | ||
101Bio WB Blocking Solution | P5W8 | 250 ml | ||
101Bio Denaturing Protein Solubilization Reagent | P5W9 | 10 ml | ||
101Bio Non-Denatured Protein Solubilization Reagent | P5W10 | 10 ml | ||
101Bio Protein Solubilization Reagent for MS | P5W11 | 2 ml | ||
101Bio SDS-Remover | P5W12 | 10 ml | ||
101Bio Albumin Depletion Reagent for Plasma and Serum | P5W13 | 10 ml | ||
101Bio Protein A+G Agarose Beads | W0349 | 1 ml | ||
101Bio Protease Inhibitor Cocktail (100x) | W2200 | 1 ml | ||
101Bio Yeast Total Protein Extraction Kit for SDS-PAGE | Y203-50 | 50 rxn |
Exosome Isolation | Purity > 95% | |
Protein Extraction | 1 min total protein, 40 min membrane protein | |
3D Cell Culture Gel | 30% < mkt=""> | |
PCR Kits | 50% < mkt=""> | |
Beta-Hexosaminidase Activity Colorimetric Assay | Fast and sensitive, High-throughput | |
Endotoxin-Free Plasmid Kits | maxi, midi and mini-prep |
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可分为以下几个类群:(1)依赖DNA的DNA聚合酶;(2)依赖RNA的DNA聚合酶;(3)依赖DNA的RNA聚合酶;(4)依赖RNA的RNA聚合酶。前两者是DNA聚合酶,它使DNA复制链按模板顺序延长。如在原核生物中仅就大肠杆菌中已被发现的就有三种(分别简称为PolⅠ,PolⅡ和PolⅢ等);DNA聚合酶只能在有引物的基础上,即在DNA或RNA引物的3′-OH延伸,这DNA的合成方向记为5′→3′。换言之DNA聚合酶催化反应除底物(αNTP)外,还需要Mg2+ 、模板DNA和引物,迄今细胞内尚无发现可从单体起始DNA的合成。同样,上述(3)和(4)是催化RNA生物合成反应中最主要的RNA合成酶,它们以四种三磷酸核糖核苷(NTP)为底物,并需有DNA模板以及Mn2 及Mg2 的存在下,在前一个核苷酸3′-OH与下一个核苷酸的5′-P聚合形成3′,5′-磷酸二酯键,其新生链的方向也是5′→3′。RNA聚合酶也大量存在于原核和真核生物的细胞中。如大肠杆菌RNA聚合酶分子量4.8×105,由5条多肽链组成,分别命名为α,α,β,β′,和γ,全酶可用α2ββ′λ表示。真核生物RNA聚合酶分子大于5×105,由10~12个大小不等亚基组成。聚合酶除作为自然界生命活动中不可缺少的组分外,在实验室中大多用作生命科学研究的工具酶类之一。
只要是细胞,就得走向衰老,现代研究表明,细胞的衰老和端粒的变短有关系。端粒就是DNA,随着细胞分裂次数的增多,端粒在不断变短,端粒酶就是组织端粒变短的。然而正常细胞中,端粒酶的活性受抑制,端粒酶是怎么染端粒变长的呢?实际上端粒酶是由RNA组成的,可以根据碱基互补配对逆转形成DNA,使得变短的端粒变长。所以说端粒酶可以逆转录形成端粒,使端粒不减短!
1970科家致癌RNA病毒发现种特殊RNA病毒聚合酶,该酶能RNA模板,根据碱基互补原则.程与般病毒转录向相反,故称逆转录,催化程酶称逆转录酶,发现哺乳物胚胎细胞裂淋巴细胞含.
逆转录病毒称携带逆转录酶病毒,先侵入宿主细胞病毒RNA模板,靠酶形DNA环化,合宿主细胞染色体原病毒形式宿主细胞代代传.
HIV(艾滋病病毒)典型逆转录病毒
TERT是端粒酶逆转录酶
人的端粒酶是由端粒酶逆转录酶、端粒酶RNA和一种假尿嘧啶合成酶组成
不过。。。。我时常用那种过期一两年的。。。。也能反转出来。只要你保存得当就可以了。一般是-20以下保存。
有DNase、RNase、核酸酶S1等,可水解相应的DNA和RNA,核酸酶S1可降解单链DNA和RNA,用量增大也可降解双链核酸。它可用于切去ds-cDNA合成中产生的发夹环。
(2)修饰酶
有些酶可在其他酶的作用下,将酶的结构进行共价修饰,使该酶活性发生改变,
核酶的催化功能与其空间结构有密切关系。
不同的核酶可分为两类:
1 剪切型核酶:只剪不接,如M1 RNA。
2 剪接型核酶:该酶具有序列特异的内切核酸酶、RNA连接酶等多种酶活性。
加工场所在生物体细胞质(或相关实验设备中)。