活化转录因子4抗体

活化转录因子4抗体

产品编号    LM1531R    

英文名称    ATF4    

中文名称    活化转录因子4抗体    

别    名    Cyclic AMP response element binding protein 2; DNA binding protein TAXREB67; Activating Transcription Factor 4; ATF 4; ATF4 protein; CREB 2; CREB2; CREB-2; Cyclic AMP dependent transcription factor ATF 4; Tax Responsive Enhancer Element B67; TAXREB67; TXREB; ATF4_HUMAN.       

研究领域    肿瘤  信号转导  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, Rat, Dog, Pig, Cow, Horse, Rabbit, Sheep,     

产品应用    WB=1:500-2000 ELISA=1:500-1000 IHC-P=1:400-800 IHC-F=1:400-800 Flow-Cyt=0.2μg /test IF=1:100-500 （石蜡切片需做抗原修复） 
not yet tested in other applications.
optimal dilutions/concentrations should be determined by the end user.    

分 子 量    38kDa    

细胞定位    细胞核 细胞浆 细胞膜     

性    状    Lyophilized or Liquid    

浓    度    1mg/ml    

免 疫 原    KLH conjugated synthetic peptide derived from human ATF4:251-351/351     

亚    型    IgG    

纯化方法    affinity purified by Protein A    

储 存 液    0.01M TBS(pH7.4) with 1% BSA, 0.03% Proclin300 and 50% Glycerol.    

保存条件    Store at -20 °C for one year. Avoid repeated freeze/thaw cycles. The lyophilized antibody is stable at room temperature for at least one month and for greater than a year when kept at -20°C. When reconstituted in sterile pH 7.4 0.01M PBS or diluent of antibody the antibody is stable for at least two weeks at 2-4 °C.    

PubMed    PubMed    

产品介绍    This gene encodes a transcription factor that was originally identified as a widely expressed mammalian DNA binding protein that could bind a tax-responsive enhancer element in the LTR of HTLV-1. The encoded protein was also isolated and characterized as the cAMP-response element binding protein 2 (CREB-2). The protein encoded by this gene belongs to a family of DNA-binding proteins that includes the AP-1 family of transcription factors, cAMP-response element binding proteins (CREBs) and CREB-like proteins. These transcription factors share a leucine zipper region that is involved in protein-protein interactions, located C-terminal to a stretch of basic amino acids that functions as a DNA binding domain. Two alternative transcripts encoding the same protein have been described. Two pseudogenes are located on the X chromosome at q28 in a region containing a large inverted duplication. [provided by RefSeq, Sep 2011]    

抗原与抗体的关系

①抗体和相应的抗原结合后，可以促进白细胞的吞噬作用而将抗原消除，使抗原失去致病作用。

②一种抗体只能抵抗一种抗原，而且一种抗体只能受相应的抗原刺激后才能形成。

免疫的功能：

免疫具有三方面的功能：

①防御功能：抵抗抗原的侵入、防止疾病的产生。

②自我稳定：清除体内衰老、死亡和损伤的细胞。

③免疫监视：监视、识别和清除体内产生的异常细胞。

特别提醒：过敏反应：当人体抵抗抗原侵入的功能过强时，在过敏原(引起过敏反应的物质，如某些食物、药物)的刺激下，人体就会发生过敏反应。

1.抗体名称容易出错

抗体一般以抗原来命名，名称核对时最简单也最容易犯错，有些蛋白质有不同亚基（HIF-1α、HIF-1β）；有些蛋白质有不同磷酸化状态，例如EGFR和p-EGFR的区别，等等。

除了蛋白质的名称外，有其他后缀。

2.多抗和单抗不同

单抗上面介绍过了，而多抗(polyclonal antibodies)一般用兔子、山羊等大型动物，因为多抗是直接从血液中纯化提取出来的，而不像单抗是用细胞培养出来的。

单克隆抗体的优点是产量持续稳定、特异性较高、但灵敏度不如多抗。如果对抗体的特异性要求高，用量较大或需要长期使用一致的抗体，制备的抗体应用要求多（WB/IP/IF/ICC等)，可以选择单克隆抗体。

多抗的特异性较差，存在批间差(因为兔子的血被放光挂掉了，而山羊可以常年养着，放点血出来，在养几天再放血，好残忍)，易造成背景，例如在WB中有杂带，在IHC中背景较深等等。但由于多抗识别多个抗原表位，对于丰度偏低的蛋白也更容易检出。