膜杰作
Star Staining
描述（Description）
HEK293/Human CD19 Stable Cell Line
应用说明（Application）
For cell-based binding assays
生长特性（Growth Properties）
Adherent
筛选标记（Selection Marker）
Puro (10 μg/mL)
培养基（Culture Medium）
DMEM + 10% FBS
冻存液（Freeze Medium）
10% DMSO + 90% FBS
装量（Quantity）
1 vial contains at least 5×10^6 cells in 1 mL serum-free cryopreservation medium
存储（Storage）
Frozen in liquid nitrogen.
支原体检测（Mycoplasma Testing）
Negative
无菌检测（Sterility Testing）
Negative
使用说明（Instructions for Use）
See data sheet for detailed culturing and assay protocol.
Receptor Assay
Fig. FACS analysis of CD19 on HEK293/Human CD19 Stable Cell Line.
FACS assay shows that Biotinylated FMC63 scFv, Fc,Avitag can bind to HEK293/Human CD19 Stable Cell Line. HEK293/Human CD19 Stable Cell Line was red line, Negative control HEK293 cells was grey line(QC tested).
Protocol
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背景（Background）
B-lymphocyte antigen CD19 is also known as CD19 (Cluster of Differentiation 19), is a single-pass type I membrane protein which contains two Ig-like C2-type (immunoglobulin-like) domains. CD19 is expressed on follicular dendritic cells and B cells. In fact, it is present on B cells from earliest recognizable B-lineage cells during development to B-cell blasts but is lost on maturation to plasma cells. It primarily acts as a B cell co-receptor in conjunction with CD21 and CD81. Upon activation, the cytoplasmic tail of CD19 becomes phosphorylated, which leads to binding by Src-family kinases and recruitment of PI-3 kinase. As on T cells, several surface molecules form the antigen receptor and form a complex on B lymphocytes. The (almost) B cell-specific CD19 phosphoglycoprotein is one of these molecules. The others are CD21 and CD81. These surface immunoglobulin (sIg)-associated molecules facilitate signal transduction. On living B cells, anti-immunoglobulin antibody mimicking exogenous antigen causes CD19 to bind to sIg and internalize with it. The reverse process has not been demonstrated, suggesting that formation of this receptor complex is antigen-induced. This molecular association has been confirmed by chemical studies. Mutations in CD19 are associated with severe immunodeficiency syndromes characterized by diminished antibody production. CD19 has been shown to interact with: CD81, CD82, Complement receptor 2, and VAV2.
Permits & Restrictions
This cell line is provided for research use only. It is not intended for any animal or human therapeutic use, any human or animal consumption, or any diagnostic use. You are not allowed to share, distribute, sell, modify, sublicense, or otherwise make this cell line available for use to other laboratories, departments, research institutions, hospitals, universities, or biotech companies. AcroBiosystems does not warrant the suitability of this cell line for any particular use, and does not accept any liability in connection with the handling or use of this cell line.
