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  • MAB5324 - Anti-Polysialic Acid-NCAM Antibody, clone 2-2B

MAB5324 Sigma-Aldrich

Anti-Polysialic Acid-NCAM Antibody, clone 2-2B

Detect Polysialic Acid-NCAM using this Anti-Polysialic Acid-NCAM Antibody, clone 2-2B validated for use in IC, IH, RIA & WB with more than 30 product citations.

Synonym: PSA-NCAM

  •  eCl@ss 32160702



Related Categories Antibodies, Primary Antibodies More...
gene symbol   NCAM1(4684)
NCBI accession no.   NM_000615.5
UniProt accession no.   P13591
Quality Assurance   Routinely evaluated by Immunohistochemistry on hippocampus.

Immunohistochemistry(paraffin) Analysis:
PSA-NCAM (cat. # MAB5324) representative staining pattern/morphology on human hippocampus. Tissue pretreated with EDTA pH 8, antigen retrieval. Antibody was diluted to 1:100, using IHC-Select® Detection with HRP-DAB. Immunoreactivity is seen as plasma membrane staining in neurons.
Optimal Staining With Epitope Retrieval: Alzheimer’s Hippocampus
Species Reactivity Notes   The monoclonal works well on all species expressing PSA-NCAM including mouse.
application(s)   Immunocytochemistry, Immunohistochemistry, Radioimmunoassay, Western Blotting
brand family   Chemicon
clone   2-2B
  Monoclonal Antibody
concentration   Please refer to the Certificate of Analysis for the lot-specific concentration.
format   Ascites
host   Mouse
isotype   IgM
molecular weight   150-300 kDa
packaging   50 µL (MAB5324)
shipped in   dry ice
species reactivity   Human, Rat, Mouse, Vertebrates
trade name   Chemicon


Analysis Note

Positive control tissue: Young Rat Hippocampus, human hippocampus.


Western Blotting: A 1:500-1:1,000 concentration of a previous lot was used in WB.

Immunocyto/histochemistry: A 1:200-1:400 dilution of a previous lot of this antibody worked on live and fixed cells, tissue sections either frozen or fixed with any kind of fixative. (Rougon et al., 1986; Theodosis et al., 1991, 1999). It is not recommend that the antibody be used on paraffin embedded tissue since it gives variable results.

Radioimmunoassay (RIA) :
A previous lot of this antibody was used in RIA. (Figarella-Branger et al., 1996)

Cell sorting and cell panning (Ben-Hur et al., 1998)

Optimal working dilutions must be determined by end user.

General description

Polysialic acid (PSA) is a long, linear homopolymer that is attached to the neural cell adhesion molecule (NCAM). It has the remarkable ability to down-regulate a wide variety of contact-dependent cell interactions. This activity is believed to stem from the ability of the charged polymer to occupy a large hydrated volume and thereby cause a direct physical hindrance of cell–cell contact. The regulated expression of PSA has been shown to promote a reduction in cell interactions that can create permissive conditions for changes in the structure of a variety of tissues.
The broadest expression of PSA occurs on precursor cells during early development and plays a role in promotion of the migration of these cells after cell division. In most cases, PSA expression is lost after the migration process is completed. However, the axons of neurons often retain PSA to bundle,sprout, and branch appropriately during axon path-finding.


Viable Meningococcus group B (strain 355).


Reacts with alpha 2-8 linked neuraminic acid (NeuAc-alpha 2-8) n with n >10. This polymer is usually termed polysialic acid (PSA). In vertebrates PSA is linked to neural cell adhesion molecule (NCAM, CD56), in bacteria it is associated with capsula of meningococcus strain group B.

Physical form

Mouse monoclonal IgM in buffer containing 50% glycerol, no preservatives.

Storage and Stability

Stable for 1 year at -20ºC in undiluted aliquots from date of receipt.
Handling Recommendations: Upon receipt, and prior to removing the cap, centrifuge the vial and gently mix the solution. Aliquot into microcentrifuge tubes and store at -20°C. Avoid repeated freeze/thaw cycles, which may damage IgM and affect product performance. Note: Variability in freezer temperatures below -20°C may cause glycerol containing solutions to become frozen during storage.

Safety & Documentation

Safety Information

Safety Information for this product is unavailable at this time.

Making Headway
Protocols & Articles


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, Detergents, Dialysis, Electroblotting, Electrophoresis, Enzyme activity, Gel electrophoresis, Immunoprecipitation, PAGE, Protein extraction, Purification, Sample preparations, Western blot

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