CD74 Antibody (CLIP/8680R)

Formalin-fixed, paraffin-embedded human tonsil stained with CD74 antibody (CLIP/8680R). Inset: PBS instead of primary antibody; secondary only negative control.

Western blot analysis of Raji cell lysate using CD74 antibody (CLIP/8680R).

• Reactivity: Hu
• Applications: WB, IHC
• Clone: CLIP/8680R
• Clonality: Monoclonal
• Host: Rabbit
• Conjugate: Unconjugated
• Concentration: 0.2 mg/ml

CD74 Antibody (CLIP/8680R) Summary

• Description: Store at 2 to 8C. Non-hazardous. No MSDS required.
• Additional Information: Recombinant Monoclonal Antibody
• Immunogen: Recombinant fragment of human CD74 protein (exact sequence is proprietary)
• Localization: Cell surface. Paranuclear globular.
• Marker: Transcription Regulator
• Specificity: Anti-CD74 stains predominantly germinal center lymphocytes and B-cell lymphomas, but rarely T-cell lymphomas. Anti-CD74 has been shown to be useful in differentiating atypical fibroxanthoma (-) from malignant fibrous histiocytoma (+).
• Isotype: IgG Kappa
• Clonality: Monoclonal
• Host: Rabbit
• Gene: CD74
• Purity: Protein A or G purified

Applications/Dilutions

• Dilutions:
  • Immunohistochemistry-Paraffin 1-2ug/ml
  • Western Blot 1-2ug/ml
• Application Notes: Immunohistochemistry-Paraffin: 1-2ug/ml for 30 minutes at RT. Staining of formalin-fixed tissues requires heating tissue sections in 10mM Tris with 1mM EDTA, pH 9.0, for 45 min at 95C followed by cooling at RT for 20 minutes. Optimal dilution for a specific application should be determined.

Packaging, Storage & Formulations

• Storage: Store at 4C.
• Buffer: 10mM PBS with 0.05% BSA
• Preservative: 0.05% Sodium Azide
• Concentration: 0.2 mg/ml
• Purity: Protein A or G purified

Alternate Names for CD74 Antibody (CLIP/8680R)

• CD74 antigen (invariant polypeptide of major histocompatibility complex, classII antigen-associated)
• CD74 antigen
• CD74 molecule, major histocompatibility complex, class II invariant chain
• CD74
• CLIP
• DHLAG
• DHLAGgamma chain of class II antigens
• HLA class II histocompatibility antigen gamma chain
• HLADG
• HLA-DR antigens-associated invariant chain
• HLA-DR-gamma
• Ia antigen-associated invariant chain
• Ia-associated invariant chain
• Ia-gamma
• Ii
• INVG34
• MHC HLA-DR gamma chain
• p33

Background

CD74, also known as the MHC class II associated invariant chain (Ii), is a type II transmembrane protein which binds to the peptide binding groove of newly synthesized MHC class II alpha/beta heterodimers and prevents their premature association with endogenous polypeptides. CD74 is produced in molar excess over MHC class II and some of this is expressed by an unknown pathway on the cell surface independent of, or in association with, MHC class II molecules. The half life of CD74 on the cell surface is only 3 to 4 min after which it is internalized. It has been proposed that cell surface CD74 binds MHC class II molecules which have lost their antigenic peptide leading to internalization and reloading with antigenic peptide. The transport route of class II alpha/beta/Ii complexes is regulated selectively by two forms of CD74 (p33 and p35) which are generated by the use of alternative translation initiation sites. CD74 is expressed primarily by antigen presenting cells such as B lymphocytes (from before the pre-B cell stage to before the plasma cell stage), macrophages and monocytes together, with many epithelial cells. CD74 may exist in different isoforms ranging in size from 33 to 41 kDa, depending on genetic splicing.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Bioinformatics

• Gene Symbol: CD74