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CD4重组兔单抗
包装与价格:
产品名称 CD4 Recombinant Rabbit mAb 产品介绍
商品属性 产品介绍This gene encodes a membrane glycoprotein of T lymphocytes that interacts with major histocompatibility complex class II antigenes and is also a receptor for the human immunodeficiency virus. This gene is expressed not only in T lymphocytes, but also in B cells, macrophages, and granulocytes. It is also expressed in specific regions of the brain. The protein functions to initiate or augment the early phase of T-cell activation, and may function as an important mediator of indirect neuronal damage in infectious and immune-mediated diseases of the central nervous system. Multiple alternatively spliced transcript variants encoding different isoforms have been identified in this gene. [provided by RefSeq, Aug 2010].
商品详情 英文名称CD4 Recombinant Rabbit mAb 中文名称CD4重组兔单抗 别 名CD4(L3T4); CD4 antigen(p55); CD4 Antigen; CD4 molecule; CD4 Receptor; CD4+Lymphocyte deficiency, included; CD4mut; L3T4; Leu3; Ly-4; Lymphocyte antigen CD4; MGC165891; p55; T Cell Antigen T4; T cell antigen T4/LEU3; T cell differentiation antigen L3T4; T cell OKT4 deficiency, included; T cell surface antigen T4/Leu 3; T cell surface antigen T4/Leu3; T Cell Surface Glycoprotein CD4; W3/25; W3/25 antigen; T-cell surface glycoprotein CD4 isoform 1 precursor; CD4_Human. 研究领域细胞生物 免疫学 干细胞 细胞表面分子 淋巴细胞 t-淋巴细胞 抗体来源Rabbit 克隆类型Recombinant 克 隆 号65H6 交叉反应Human 产品应用WB=1:500-2000,IHC-P=1:100-500,IHC-F=1:100-500,IF=1:100-500,Flow-Cyt=1ug/Test not yet tested in other applications. optimal dilutions/concentrations should be determined by the end user. 理论分子量48 kDa 检测分子量 细胞定位细胞膜 性 状Liquid 浓 度1mg/ml 免 疫 原A synthesized peptide derived from human CD4: 200-400 亚 型IgG 纯化方法affinity purified by Protein A 缓 冲 液0.01M TBS (pH7.4) with 1% BSA, 0.02% Proclin300 and 50% Glycerol. 保存条件Shipped at 4℃. Store at -20℃ for one year. Avoid repeated freeze/thaw cycles. 注意事项This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications. PubMedPubMed 靶点与功能 CD4(Cluster of Differentiation 4)是55kDa跨膜糖蛋白(免疫球蛋白超家族成员),核心功能与研究价值包括: T细胞亚群标志物:特异性表达于辅助性T细胞(Th1/Th2/Th17)、调节性T细胞(Treg)及部分树突状细胞表面,流式检测中CD4⁺CD8⁻ T细胞占外周血T细胞的60-70%; 免疫共受体作用:通过胞外域D1区与MHC II类分子β2结构域结合,胞内段与Lck激酶关联,参与TCR信号放大,是T细胞活化的“分子开关”; 疾病关联:HIV通过CD4入侵T细胞导致免疫缺陷,而肿瘤微环境中CD4⁺ T细胞浸润密度与PD-1抑制剂响应率正相关(J Clin Oncol, 2024)。 实验操作关键要点 流式细胞术(T细胞亚群分析): 样本处理:人外周血PBMC用PBS+2% FBS洗涤2次,CD4抗体(如Bethyl A700-015,PE标记)1:100稀释,4℃避光孵育30分钟,联合CD3-APC/CD8-FITC抗体,流式检测CD3⁺CD4⁺ T细胞比例(健康人参考范围30-40%); 关键对照:同型对照(兔IgG-PE)确保非特异性结合率<2%,阳性对照选用Jurkat细胞(低表达CD4)和CD4⁺ T细胞系(如SupT1)。 IHC-P肿瘤浸润T细胞定位: 样本:非小细胞肺癌组织石蜡切片,CD4在肿瘤间质淋巴细胞细胞膜呈棕黄色阳性,计数阳性细胞密度(>5个/HPF提示预后较好); 抗原修复:柠檬酸盐缓冲液(pH6.0)微波修复15分钟,3% H₂O₂室温封闭10分钟,抗体1:200稀释(5% BSA+TBST),4℃孵育过夜。 WB检测T细胞活化后表达变化: 样本处理:人CD4⁺ T细胞经抗CD3/CD28磁珠刺激72小时,RIPA裂解液(含1mM PMSF)冰上裂解30分钟,12000g离心15分钟取上清; 结果判断:55kDa条带灰度值较未刺激组升高2倍(伴随CD69/CD25活化标志物上调),内参选用β-Actin(42kDa)。 公司正在出售的产品
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