Anti-CD19抗体是一种质膜蛋白质，参与信号传导作用。表达与前B细胞和成熟的B细胞膜表面，与B细胞的活化调节和发育调节相关，在T细胞和正常粒细胞上无表达。此抗体可以特异性识别CD19，主要用于标记正常B细胞及肿瘤性B细胞。

产品编号 yb-4755R
英文名称 Anti-CD19抗体
中文名称 CD19抗体
别    名 Antibody deficiency due to defect in CD19, included; AW495831; B lymphocyte antigen CD19; B lymphocyte surface antigen B4; B4; CD 19; CD19 antigen; CD19 molecule; Cd19 protein; Differentiation Antigen CD19; Leu 12; Leu12; Lymphocyte Surface Antigen; MGC109570; MGC12802; T-cell surface antigen Leu-12.
Anti-CD19抗体  
说 明 书 0.1ml  0.2ml  
研究领域 肿瘤  细胞生物  干细胞  细胞表面分子  淋巴细胞  b-淋巴细胞  
抗体来源 Rabbit
克隆类型 Polyclonal
交叉反应 Human, Mouse, Rat, Pig, Guinea Pig, 
产品应用 WB=1:100-500 ELISA=1:500-1000 IHC-P=1:100-500 IHC-F=1:100-500 Flow-Cyt=1:100-500 ICC=1:100-500 IF=1:50-200 （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 59kDa
细胞定位 细胞膜 
性    状 Lyophilized or Liquid
浓    度 1mg/1ml
免 疫 原 KLH conjugated synthetic peptide derived from human CD19 (171-220aa)
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:
CD19 is a transmembrane glycoprotein that is delectively expressed on the cell surface of B-lymphocytes,where it activates intracellular signaling cascades involving both Ras and phosphatidylinositol 3-kinase pathways.Lymphocytes proliferate and differentiate in response to various concentrations of different antigens. The ability of the B cell to respond in a specific, yet sensitive manner to the various antigens is achieved with the use of low-affinity antigen receptors. This gene encodes a cell surface molecule which assembles with the antigen receptor of B lymphocytes in order to decrease the threshold for antigen receptor-dependent stimulation. 

Function:
Assembles with the antigen receptor of B-lymphocytes in order to decrease the threshold for antigen receptor-dependent stimulation.

Subunit:
Forms a complex with CD21, CD81 and CD225 in the membrane of mature B-cells. Interacts with VAV. Interacts with GRB2 and SOS when phosphorylated on Tyr-348 and/or Tyr-378. Interacts with PLCG2 when phosphorylated on Tyr-409. Interacts with LYN.

Subcellular Location:
Membrane; Single-pass type I membrane protein.

Post-translational modifications:
Phosphorylated on serine and threonine upon DNA damage, probably by ATM or ATR. Phosphorylated on tyrosine following B-cell activation. Phosphorylated on tyrosine residues by LYN.

DISEASE:
Defects in CD19 are the cause of immunodeficiency common variable type 3 (CVID3) [MIM:613493]; also called antibody deficiency due to CD19 defect. CVID3 is a primary immunodeficiency characterized by antibody deficiency, hypogammaglobulinemia, recurrent bacterial infections and an inability to mount an antibody response to antigen. The defect results from a failure of B-cell differentiation and impaired secretion of immunoglobulins; the numbers of circulating B-cells is usually in the normal range, but can be low.

Similarity:
Contains 2 Ig-like C2-type (immunoglobulin-like) domains.

是一种质膜蛋白质，参与信号传导作用。表达与前B细胞和成熟的B细胞膜表面，与B细胞的活化调节和发育调节相关，在T细胞和正常粒细胞上无表达。此抗体可以特异性识别CD19，主要用于标记正常B细胞及肿瘤性B细胞。