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免疫球蛋白D重链保守区重组兔单抗
包装与价格:
产品名称 Human IgD Recombinant Rabbit mAb 产品介绍
免疫球蛋白D重链保守区重组兔单抗 商品属性
中文名称免疫球蛋白D重链保守区重组兔单抗 别 名IGHD; Constant region of heavy chain of IgD; Ig delta chain C region; Ig delta chain C region secreted form; Igh-5; Immunoglobulin delta; Immunoglobulin heavy constant delta; IGHD_HUMAN; Immunoglobulin heavy delta chain. 抗体来源Rabbit 克隆类型Recombinant 克 隆 号20D14 交叉反应Human 产品应用IHC-P=1:50-200,IHC-F=1:50-200,IF=1:50-200 not yet tested in other applications. optimal dilutions/concentrations should be determined by the end user. 理论分子量42 kDa 检测分子量 细胞定位细胞膜 分泌型蛋白 性 状Liquid 浓 度1mg/ml 亚 型 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 °C 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 产品介绍Ig delta chain C region is an allelic product of the human IGHD gene. The two known IGHD alleles, IGHD*01 and IGHD*02, respectively produce isoforms 1, a secreted protein, and 2, a single-pass type I membrane protein. A member of the adaptive immune system, IgD antibodies are monomers expressed by activated B cells. Containing 3 Ig-like (immunoglobulin-like) domains, IgD chain C is located on chromosome 14 within the human heavy chain locus, lying on the 3’ side of the IgM chain C region from the V-D-J cassette. Polyadenylation at certain sites along the heavy chain locus likely effects the mechanism that determines the alternative splicing event which results in the expression of either IgD chain C or IgM chain C. Some studies have suggested that antigenic coactivation of IgD+ B cells can have a negative influence on bone resorption during infectious events. 靶点与功能
IgD重链(δ链)的保守区位于恒定区(Cδ),包含3个免疫球蛋白样结构域,在不同个体和物种中序列高度保守。其核心功能与研究价值包括: B细胞受体(BCR)组成:与IgM共同表达于成熟B细胞表面,参与B细胞活化信号转导和免疫耐受调节; 免疫应答调控:在过敏反应、自身免疫病中通过与Fc受体结合调节炎症反应,近年发现其在肠道黏膜免疫中发挥独特作用; 疾病标志物:B细胞表面IgD异常表达与慢性淋巴细胞白血病(CLL)、系统性红斑狼疮(SLE)等疾病相关。 实验操作关键要点
流式细胞术检测(外周血B细胞): 样本处理:EDTA抗凝全血经红细胞裂解液处理后,用含2% FBS的PBS重悬至1×10⁶细胞/mL; 抗体孵育:抗体1:50稀释,4℃避光孵育30分钟,洗涤2次后用Alexa Fluor 488标记二抗(1:1000)室温孵育20分钟; 阳性判定:正常成人外周血中IgD⁺ B细胞占比约5-15%,可与CD19/CD20抗体联合标记。 IHC-P组织染色(扁桃体/淋巴结): 抗原修复:采用柠檬酸钠缓冲液(pH6.0) 微波修复15分钟(95℃),增强膜蛋白信号; 阳性定位:生发中心边缘区B细胞胞膜呈线性棕黄色阳性,浆细胞阴性(IgD主要表达于未成熟B细胞); 对照设置:必须包含IgD敲除小鼠脾脏组织(阴性对照)和正常扁桃体组织(阳性对照)。 公司正在出售的产品
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