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  4. CD19 Antibody (YA543)

CD19 Antibody (YA543) is a Rabbit-derived and non-conjugated IgG monoclonal antibody, targeting to CD19.

For research use only. We do not sell to patients.

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Top Publications Citing Use of Products
  • WB: Western Blot;
  • IHC-P: Immunohistochemistry-Paraffin;
  • IHC-F: Immunohistochemistry-Frozen;
  • ICC/IF: Immunocytochemistry/Immunofluorescence;
  • IF-Tissue: Immunofluorescence-Tissue;
  • mIHC: Multiplex Immunohistochemical;
  • IP: Immunoprecipitation;
  • ChIP: Chromatin Immunoprecipitation;
  • FC: Flow Cytometry;
  • ELISA: Enzyme Linked Immunosorbent Assay
  • Product Detail

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  • Documentation

Description

CD19 Antibody (YA543) is a Rabbit-derived and non-conjugated IgG monoclonal antibody, targeting to CD19.

Host

Rabbit

Clonality

Recombinant,Monoclonal

Molecular Weight
Predicted band size: 61 kDa;
Observed band size: 90 kDa
Note: Due to possible protein modifications or aggregation, the molecular weight should be confirmed by actual measurement, and the predicted value is for reference only.
Species Reactivity
Human
SwissProt ID
Gene ID
Immunogen

Synthetic peptide corresponding to Human CD19.AA range:294-556.

Application &
Dilution Ratio
Application Dilution Ratio
WB
WB: Western Blot
1:1000-1:2000
ICC/IF
ICC/IF: Immunocytochemistry/Immunofluorescence
1:50-1:200
IHC-P
IHC-P: Immunohistochemistry-Paraffin
1:50-1:200
FC
FC: Flow Cytometry
1:50-1:1000
Sensitivity Endogenous Purity Protein A affinity purified.
Conjugation Non-conjugated Modification Unmodified
Isotype IgG  
Appearance

Liquid

Formulation

Supplied in 1*TBS (pH7.4), 0.05% BSA and 40% Glycerol. Preservative: 0.05% Sodium Azide.

Storage & Stability

Stored at -20°C for 1 year. Avoid repeated freeze / thaw cycles.

Shipping

Shipping with blue ice.

Verification Image
ALL WB ICC FC
  • Western blot analysis of extracts from Raji(lane 2(20μg)) or (lane 4(40μg)) using CD19 (HY-P80446) Rabbit mAb. Proteins were transferred to a PVDF membrane and blocked with 5% BSA in TBST for 2 hour at room temperature. The primary antibody (1/1000) and Loading control antibody (Beta Actin, HY-P80438, 1/10000) was used in 5% BSA in TBST at 4°C overnight. Goat Anti-Rabbit IgG-HRP Secondary Antibody (1/10,000) was used for 1 hour at room temperature.

  • Immunocytochemistry analysis of Raji cells labeling CD19 with CD19 Antibody (HY-P80446) at 1/50 dilution. Cells were fixed in 4% paraformaldehyde for 15 minutes at room temperature, permeabilized with 0.1% Triton X-100 for 10 minutes at room temperature, then blocked with QuickBlock™ Blocking Buffer for Immunol Staining for 10 min at room temperature. Cells were then incubated with CD19 Antibody (HY-P80446) at 1/50 dilution in QuickBlock™ Blocking Buffer for Immunol Staining at 4 ℃. Alexa Fluor® 488-conjugated AffiniPure Goat Anti-Rabbit IgG H&L(HY-P8002, Green) was used as the secondary antibody at 1/1,000 dilution. PBS instead of the primary antibody was used as the secondary antibody only control. The Nuclear counterstain was DAPI (Blue).

  • Immunocytochemistry analysis of Ramos cells labeling CD19 with CD19 Antibody (HY-P80446) at 1/50 dilution. Cells were fixed in 4% paraformaldehyde for 15 minutes at room temperature, permeabilized with 0.1% Triton X-100 for 10 minutes at room temperature, then blocked with QuickBlock™ Blocking Buffer for Immunol Staining for 10 min at room temperature. Cells were then incubated with CD19 Antibody (HY-P80446)at 1/50 dilution in QuickBlock™ Blocking Buffer for Immunol Staining at 4 ℃. Alexa Fluor® 488-conjugated AffiniPure Goat Anti-Rabbit IgG H&L(HY-P8002,Green) was used as the secondary antibody at 1/1,000 dilution. PBS instead of the primary antibody was used as the secondary antibody only control. The Nuclear counterstain was DAPI (Blue).

  • Flow cytometric analysis of 1X10^6 Raji cells labeling CD19 Antibody (HY-P80446, red). Cells were fixed with 4% paraformaldehyde and permeabilised with 90% methanol. Then stained with the primary antibody at 1μg/mL dilution for an hour at 4℃. Alexa Fluor® 488-conjugated AffiniPure Goat Anti-Rabbit IgG H&L (HY-P8002) was used as the secondary antibody at 1/1,000 dilution for 30 minutes at 4℃. Rabbit IgG Isotype Control (HY-P80879, blue) was used as the isotype control, cells without incubation with primary antibody were used as the unlabeled control (black).

Background
Function:Functions as a coreceptor for the B-cell antigen receptor complex (BCR) on B-lymphocytes (PubMed:29523808). Decreases the threshold for activation of downstream signaling pathways and for triggering B-cell responses to antigens (PubMed:1373518, PubMed:16672701, PubMed:2463100). Activates signaling pathways that lead to the activation of phosphatidylinositol 3-kinase and the mobilization of intracellular Ca(2+) stores (PubMed:12387743, PubMed:16672701, PubMed:9317126, PubMed:9382888). Is not required for early steps during B cell differentiation in the blood marrow (PubMed:9317126). Required for normal differentiation of B-1 cells (By similarity). Required for normal B cell differentiation and proliferation in response to antigen challenges (PubMed:1373518, PubMed:2463100). Required for normal levels of serum immunoglobulins, and for production of high-affinity antibodies in response to antigen challenge (PubMed:12387743, PubMed:16672701, PubMed:9317126)
Subcellular Localization:Cell membrane; Single-pass type I membrane protein; Membrane raft; Single-pass type I membrane protein
Expression:
Tissue_specificity:Detected in B cells in the marginal zone of lymph nodes and germinal centers (PubMed:2463100) . Detected in blood B cells (protein levels) (PubMed:16672701, PubMed:2463100) .
Isoforms & Post-Translational Modification:P15391 has 2 isomers: P15391-1: 61128 Da (predicted); P15391-2: 61200 Da (predicted).
Phosphorylated on tyrosine following B-cell activation (PubMed:10706702, PubMed:12387743, PubMed:7684160, PubMed:7687539). Phosphorylated on tyrosine residues by LYN (PubMed:7687428). Tyrosine residues are phosphorylated sequentially after activation of the B cell receptor. Phosphorylation of Tyr-531 is extremely rapid, followed by phosphorylation at Tyr-409. In contrast, phosphorylation of Tyr-500 appears more slowly and is more transient, returning rapidly to basal levels (By similarity)
Subunit:Interacts with CR2/CD21 (PubMed:1702139). Part of a complex composed of CD19, CR2/CD21, CD81 and IFITM1/CD225 in the membrane of mature B-cells (PubMed:1383329). Interacts directly with CD81 (via the second extracellular domain); this interaction is initiated early during biosynthesis in the ER/pre-Golgi compartments and is essential for trafficking and compartmentalization of CD19 receptor on the cell surface of activated B cells (PubMed:16449649). Interacts with VAV (PubMed:10706702). Interacts with GRB2 and SOS when phosphorylated on Tyr-348 and/or Tyr-378. Interacts with PLCG2 when phosphorylated on Tyr-409 (PubMed:10706702). Interacts with LYN (PubMed:7687428). Interacts (when tyrosine phosphorylated) with the regulatory p85 subunit of phosphatidylinositol 3-kinase (PIK3R1 or PIK3R2) (PubMed:7684160). Interacts with GRB2 (PubMed:29523808)
RRID
Database

Entrez Gene: 930 Human

SwissProt: P15391 Human

OMIM: 613493 Human

Research Field

Immunology

Synonyms
CD19_HUMAN; B-lymphocyte antigen CD19; B-lymphocyte surface antigen B4; Differentiation antigen CD19; T-cell surface antigen Leu-12; CD_antigen: CD19; B-lymphocyte surface antigen B4; Leu 12; Leu12;
Documentation
Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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CD19 Antibody (YA543)
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HY-P80446
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