英文名称    CTLA4    

中文名称    细胞毒性T细胞抗原-4抗体    

别    名    CD 152; CD152; CD152 antigen; Celiac disease 3; CELIAC3; CTLA 4; CTLA-4; Cytotoxic T cell associated 4; Cytotoxic T lymphocyte associated 4; Cytotoxic T lymphocyte associated antigen 4; Cytotoxic T lymphocyte associated protein 4; Cytotoxic T lymphocyte associated serine esterase 4; Cytotoxic T lymphocyte protein 4; Cytotoxic T-lymphocyte-associated antigen 4; Cytotoxic T-lymphocyte-associated protein 4; GSE; IDDM12.      

Specific References  (1)     |     bs-10006R has been referenced in 1 publications.

[IF=4.12] Seike, Masahiro, et al. "Histamine suppresses regulatory T cells mediated by TGF‐β in murine chronic allergic contact dermatitis." Experimental Dermatology(2015).  IHC-F ;  Mouse.  

PubMed:25651189

抗体来源    Rabbit    

克隆类型    Polyclonal    

交叉反应    Human, Mouse, Rat, Dog, Cow, Rabbit, Sheep,     

产品应用    WB=1:500-2000 ELISA=1:500-1000 Flow-Cyt=1μg/Test  

not yet tested in other applications.

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

分 子 量    21kDa    

细胞定位    细胞膜 细胞外基质     

性    状    Lyophilized or Liquid    

浓    度    1mg/ml    

免 疫 原    KLH conjugated synthetic peptide derived from human CTLA-4/CD152:75-170/223 <Extracellular>    

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    background:

This gene is a member of the immunoglobulin superfamily and encodes a protein which transmits an inhibitory signal to T cells. The protein contains a V domain, a transmembrane domain, and a cytoplasmic tail. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. The membrane-bound isoform functions as a homodimer interconnected by a disulfide bond, while the soluble isoform functions as a monomer. Mutations in this gene have been associated with insulin-dependent diabetes mellitus, Graves disease, Hashimoto thyroiditis, celiac disease, systemic lupus erythematosus, thyroid-associated orbitopathy, and other autoimmune diseases.





抗原抗体结合特点

 1）特异性：抗原分子只能与由它刺激所产生的抗体结合而起反应的专一性能；

 2）可逆性：是指Ag与相应Ab结合成IC后，在一定条件下可解离为游离抗原与抗体。

 3）阶段性：

 一阶段：特异性结合阶段 （①反应速度快，几秒钟或几分钟即可完成 ②不出现肉眼可见反应）；

 第二阶段：可见阶段（表现为凝集、沉淀、补体结合等反应 ①反应进行慢，需要几分钟、几十分钟或更长②受电解质、温度、酸碱度等多种因素影响）。

4）比例性：（最适比或等价点）是指抗原与抗体发生可见反应需遵循一定的量比关系，只有当二者浓度比例适当时，才出现可见反应。

抗原抗体反应影响因素：

（一）反应物自身的因素

5） 抗体：不同来源的抗体,反应性各有差异,抗体的浓度、特异性和亲和力都影响抗体抗原反应,为提高试验的可靠性,应选择高特异性、高亲和力的抗体作诊断试剂.等价带的宽窄也影响抗原抗体复合物的形成,单克隆抗体不适用于沉淀反应.

6）  抗原：抗原的理化性状、分子量、抗原决定簇的种类及数目均可影响反应结果.颗粒性抗原出现凝集反应,可溶性抗原出现沉淀反应,单价抗原与相应抗体结合不出现沉淀现象.

（二）反应环境条件

7） 酸碱度：抗原抗体反应必须在合适的pH环境中进行.蛋白质具有两性电离性质,因此每种蛋白质都有固定的等电点.抗原抗体反应一般在pH6～9进行,有补体参与的反应pH为7.7.4,pH过高或过低都将影响抗原与抗体反应.

8）  温度：在一定范围内,温度升高可加速分子运动,抗原与抗体碰撞机会增多,使反应加速.一般为15℃～40℃,常用的抗原抗体反应温度为37℃,温度如高于56℃,可导致已结合的抗原抗体再解离,甚至变性或破坏.每种试验都有其独特的最适反应温度要求.此外,适当振荡也可促进抗原抗体分子的接触,加速反应.

9）  电解质：抗原与抗体发生特异性结合后,虽由亲水胶体变为疏水胶体,若溶液中无电解质参加,仍不出现可见反应.为了促成沉淀物或凝集物的形成,常用0.85%NaCl或各种缓冲液作为抗原及抗体的稀释液.