端粒酶逆转录酶抗体

商品详情：
英文名称：TERT

别    名:EST2; hEST2; TCS1; Telomerase associated protein 2; Telomerase Catalytic Subunit; Telomere Reverse Transcriptase; Telomerase reverse transcriptase; TERT; TP2; TRT; TERT_HUMAN; Telomerase reverse transcriptase; HEST2; Telomerase catalytic subunit; Telomerase-associated protein 2.

研究领域:肿瘤  细胞生物  免疫学  细胞凋亡  转录调节因子

抗体来源:Rabbit

克隆类型:Polyclonal

交叉反应:Human, Mouse,  (predicted: Rat, Dog, )

产品应用:WB=1:500-2000 ELISA=1:5000-10000 Flow-Cyt=1μg/Test ICC=1:100

not yet tested in other applications.

optimal dilutions/concentrations should be determined by the end user.

理论分子量:124kDa

细胞定位:细胞核 细胞浆

性    状:Liquid

浓    度:1mg/ml

免 疫 原:KLH conjugated synthetic peptide derived from human TERT: 521-620/1132

亚    型:IgG

纯化方法:affinity purified by Protein A

缓 冲 液:0.01M TBS(pH7.4) with 1% BSA, 0.03% Proclin300 and 50% Glycerol.

注意事项:This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.

产品介绍:Telomerase is a ribonucleoprotein enzyme essential for the replication of chromosome termini in most eukaryotes. It elongates telomeres. It is a reverse transcriptase that adds simple sequence repeats to chromosome ends by copying a template sequence within the RNA component of the enzyme. Telomerase are large DNA-protein complexes with telomerase expression being the subject of recent research due to its link to cell immortalization. Recent evidence has shown that MYC upregulates the catalytic subunit of telomerase, TERT, and that Telomerase is a ribonucleoprotein polymerase that maintains telomere ends by addition of the telomere repeat TTAGGG. The enzyme consists of a protein component with reverse transcriptase activity, encoded by this gene, and an RNA component which serves as a template for the telomere repeat. Telomerase expression plays a role in cellular senescence, as it is normally repressed in postnatal somatic cells resulting in progressive shortening of telomeres. Deregulation of telomerase expression in somatic cells may be involved in oncogenesis. Studies in mouse suggest that telomerase also participates in chromosomal repair, since de novo synthesis of telomere repeats may occur at double-stranded breaks. Alternatively spliced variants encoding different isoforms of telomerase reverse transcriptase have been identified; the full-length sequence of some variants has not been determined. Alternative splicing at this locus is thought to be one mechanism of regulation of telomerase activity. [provided by RefSeq, Jul 2008].

Telomerase is a ribonucleoprotein enzyme essential for the replication of chromosome termini in most eukaryotes. Active in progenitor and cancer cells. Inactive, or very low activity, in normal somatic cells. Catalytic component of the teleromerase holoenzyme complex whose main activity is the elongation of telomeres by acting as a reverse transcriptase that adds simple sequence repeats to chromosome ends by copying a template sequence within the RNA component of the enzyme. Catalyzes the RNA-dependent extension of 3'-chromosomal termini with the 6-nucleotide telomeric repeat unit, 5'-TTAGGG-3'. The catalytic cycle involves primer binding, primer extension and release of product once the template boundary has been reached or nascent product translocation followed by further extension. More active on substrates containing 2 or 3 telomeric repeats. Telomerase activity is regulated by a number of factors including telomerase complex-associated proteins, chaperones and polypeptide modifiers. Modulates Wnt signaling. Plays important roles in aging and antiapoptosis.

商品属性：

实验原理 :

（1）公司产品仅用于科研特异性结合抗原：抗体本身不能直接溶解或杀伤带有特异抗原的靶细胞，通常需要补体或吞噬细胞等共同发挥效应以清除病原微生物或导致病理损伤。然而，抗体可通过与病毒或毒素的特异性结合，直接发挥中和病毒的作用。

（2）活补体：IgM、IgG1、IgG2和IgG3可通过经典途径激活补体，凝聚的IgA、IgG4和IgE可通过替代途径激活补体。

（3）结合细胞：不同类别的免疫球蛋白，可结合不同种的细胞，参与免疫应答。

（4）可通过胎盘及粘膜：免疫球蛋白G（IgG）能通过胎盘进入胎儿血流中，使胎儿形成自然被动免疫。免疫球蛋白A（IgA）可通过消化道及呼吸道粘膜，是粘膜局部抗感染免疫的主要因素。

（5）具有抗原性：抗体分子是一种蛋白质，也具有刺机体产生免疫应答的性能。不同的免疫球蛋白分子，各具有不同的抗原性。

（6）抗体对理化因子的抵抗力与一般球蛋白相同：不耐热，60～70℃即被破坏。各种酶及能使蛋白质凝固变性的物质，均能破坏抗体的作用。抗体可被中性盐类沉淀。在生产上常可用硫酸铵或硫酸钠从免疫血清中沉淀出含有抗体的球蛋白，再经透析法将其纯化。

一抗和二抗的区别：

第一抗体就是平常所说的抗体，即能和抗原特异性结合。

第二抗体是能和抗体结合的，即抗体的抗体。主要用于检测抗体的存在。

一抗是针对抗原的抗体，二抗是针对一抗的抗体。即抗体也可以充当抗原刺激机体产生抗体。也就是说，抗原进入机体刺激机体免疫系统产生免疫应答，由B细胞可以产生与相应抗原发生特异性结合的特殊蛋白质。

一抗二抗都是一种可以特异结合别的物质的基团，而且一抗可以至少结合两种其他基团（底物和二抗）。

一抗：可以特异结合底物，就是识别出我们想要检测的东西。一抗和底物结合与否用肉眼是看不出来的。

二抗：可以和一抗结合，并带有可以被检测出的标记(如带荧光、放射性、化学发光或显色基团），作用是检测一抗。 如果一抗自己带有可以被检测出的标记(如带荧光、放射性、化学发光或显色基团），则不需要二抗。但这样成本很高，因为一种一抗只识别一种底物。所以如今的设计一般是二抗带上可检测标记，再来检测一抗。而一抗识别底物。这样，当一抗结合到底物上，就可以通过二抗检测出来。
抗体的标记实验要点：

1.如在反应混合液中有叠氮钠或游离氨基存在,会抑制标记反应。因此,蛋白质在反应前要对 0.1mol/L缓冲液或0.5mol/L硼酸缓冲液充分透析；

2.所用的NHSB及待化蛋白质之间的分子比按蛋白质表面的ε-氨基的密度会有所不同,选择不当则影响标记的效率,应先用几个不同的分子比来筛选最适条件；

3.用NHSB量过量也是不利的,抗原的结合位点可能因此被封闭,导致抗体失活；

4.由于抗体的氨基不易接近可能造成化不足,此时可加入去污剂如 Triton x-100, Tween20等；

5.当游离ε-氨基(赖氨酸残基的氨基)存在于抗体的抗原结合位点时,或位于酶的催化位点时,化会降低或损伤抗体蛋白的结合力或活性；

6.还可能与不同的功能基团,如羰基、氨基、巯基、异咪唑基及基,也可与糖基共价结合；

7.交联反应后,应充分透析,否则,残余的会对化抗体与亲和素的结合产生竞争作用；

8.在细胞的荧光标记实验中,中和亲和素的本底低,但由于链霉亲和素含有少量正电荷,故对某些细胞可导致高本底。

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