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GW23003 Sigma-Aldrich

Anti-CD19 antibody produced in chicken

affinity isolated antibody, buffered aqueous solution

Synonym: Anti-CD19



Related Categories A to L, Alphabetical Index, Analytical Cytology, Antibodies, Antibodies for Cell Biology,
conjugate   unconjugated
clone   polyclonal
biological source   chicken
application(s)   western blot: suitable
species reactivity   human
form   buffered aqueous solution
shipped in   wet ice
storage temp.   −20°C
antibody form   affinity isolated antibody
Quality Level   200
antibody product type   primary antibodies
mfr. no.   Genway, 15-288-23003
NCBI accession no.   NP_001761.2
UniProt accession no.   P15391
Gene Information   human ... CD19(930)


General description

CD19 is a 95kDa protein localized on the surface of nearly all B lymphocytes, and is considered to be the specific surface marker for B cells. This protein belongs to the immunoglobulin (Ig) superfamily with a cytoplasmic region of ~240 amino acids, and is involved in the regulation of B cell function. The protein is encoded by the 7.41kb cd19 gene, mapped on the short arm of human chromosome 16p11.2.
There are certain localized regions of strong net negative charge with nine tyrosine residues in the cytoplasmic region of CD19. These regions might regulate the interaction of CD19 with the proto-oncogene Vav, phosphatidylinositol-3 kinase (PI-3 kinase), and the Lyn, Lck, and Fyn protein tyrosine kinases.


B-lymphocyte antigen CD19.

Immunogen Sequence: GI # 23397636, sequence 101-291

Physical form

Solution in phosphate buffered saline containing 0.02% sodium azide.


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Biochem/physiol Actions

CD19 expression is restricted to normal and malignant B-lineage cells. Therefore, it is considered to be a striking target for immunotherapies aimed at B-cell malignancies. CD19 helps B lymphocytes to initiate primary immune response even at low concentrations of antigen. The encoded protein plays a crucial role in initiating intrinsic B cell signaling thresholds by regulating both B cell receptor (BCR)-dependent and independent signaling. It also functions as a biomarker for B-cell development.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable
Protocols & Articles


Antibody Basics

Immunoglobulins (Igs) are produced by B lymphocytes and secreted into plasma. The Ig molecule in monomeric form is a glycoprotein with a molecular weight of approximately 150 kDa that is shaped more ...
Keywords: Affinity chromatography, Centrifugation, Chromatography, Digestions, Direct immunofluorescence, Gene expression, High performance liquid chromatography, Immunofluorescence, Ion Exchange, Microscopy, Precipitation, Purification, Rheumatology, Scanning electron microscopy


Western Blot Protocol | Immunoblotting Protocol

Western Blotting refers to the electrophoretic transfer of proteins from sodium dodecyl sulfate polyacrylamide gels to sheets of PVDF or nitrocellullose membrane, followed by immunodetection of prote...
Keywords: AGE, Buffers, Cell disruption, Detection methods, Detergents, Dialysis, Electroblotting, Electrophoresis, Enzyme activity, Gel electrophoresis, Immunoprecipitation, PAGE, Protein extraction, Purification, Sample preparations, Western blot

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