Invitrogen™ CD19 Polyclonal Antibody

Rabbit Polyclonal Antibody

Supplier:  Invitrogen™ PA527442

Catalog No. PIPA527442

Description

Recommended positive controls: Raji, mouse leukocyte. Predicted reactivity: Pig (86%), Bovine (82%). Store product as a concentrated solution. Centrifuge briefly prior to opening the vial.

CD19 is a member of the immunoglobulin superfamily, characterized by two Ig-like domains, and is expressed on B cells throughout all stages of development, excluding terminally differentiated plasma cells. It is also expressed on follicular dendritic cells and has been observed on myeloid leukemia cells, particularly those of monocytic lineage. CD19 is considered the earliest and broadest B cell-restricted antigen, and its expression is found in all B cell precursor leukemias. CD19 forms a multimolecular complex with CD21, CD81, Leu13, MHC class II, and the B cell receptor (BCR), playing a crucial role in B cell signaling. As a signal-amplifying coreceptor for the BCR, CD19 lowers the threshold for antigen receptor-dependent stimulation, allowing B cells to respond specifically and sensitively to various antigens through low-affinity antigen receptors. Signaling through CD19 induces tyrosine phosphorylation, calcium flux, and proliferation of B cells. Beyond its role as a BCR coreceptor, CD19 can also signal independently of BCR co-ligation, serving as a central regulatory component upon which multiple signaling pathways converge. This makes CD19 an important functional regulator of both normal and malignant B cell proliferation. Mutations in the CD19 gene can result in hypogammaglobulinemia, a condition characterized by low levels of immunoglobulins, while CD19 overexpression can lead to B cell hyperactivity. CD19 is expressed on 100% of peripheral B cells, as defined by the expression of kappa or lambda light chains, underscoring its significance in B cell function and immune regulation.

Specifications

• Antigen: CD19
• Classification: Polyclonal
• Conjugate: Unconjugated
• Gene: Cd19
• Gene Alias: AW495831; B4; B-lymphocyte antigen CD19; B-lymphocyte surface antigen B4; Cd19; CD19 antigen; CD19 molecule; CVID3; differentiation antigen CD19; Leu-12; T-cell surface antigen Leu-12
• Host Species: Rabbit
• Purification Method: Antigen affinity chromatography
• Regulatory Status: RUO
• Gene ID (Entrez): 12478, 930
• Content And Storage: Store at 4°C short term. For long term storage, store at -20°C, avoiding freeze/thaw cycles.
• Form: Liquid

• Applications: Flow Cytometry, Immunohistochemistry (Paraffin), Western Blot, Immunocytochemistry
• Concentration: 0.21 mg/mL
• Formulation: PBS with 1% BSA, 20% glycerol and 0.025% ProClin 300; pH 7
• Gene Accession No.: P15391, P25918
• Gene Symbols: Cd19
• Immunogen: Recombinant protein encompassing a sequence within the Intracellular domain of human CD19. The exact sequence is proprietary.
• Quantity: 100 μL
• Primary or Secondary: Primary
• Target Species: Human, Mouse
• Product Type: Antibody
• Isotype: IgG