Recombinant Human CD74 Protein

Product Discontinued

Recombinant Human CD74 Protein Summary

• Description: A recombinant protein with a C-Terminal His-tag and corresponding to the amino acids 73-232 of Human CD74
  
  

  Source:Baculovirus

  Amino Acid Sequence: QQQGRLDKLT VTSQNLQLEN LRMKLPKPPK PVSKMRMATP LLMQALPMGA LPQGPMQNAT KYGNMTEDHV MHLLQNADPL KVYPPLKGSF PENLRHLKNT METIDWKVFE SWMHHWLLFE MSRHSLEQKP TDAPPKESLE LEDPSSGLGV TKQDLGPVPM HHHHHH

• Source: Baculovirus
• Protein/Peptide Type: Recombinant Protein
• Gene: CD74
• Purity: >85%, by SDS-PAGE
• Endotoxin Note: < 1.0 EU per 1 microgram of protein (determined by LAL method)

Applications/Dilutions

• Dilutions:
  • SDS-Page
• Theoretical MW: 19.05 kDa.
  Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Packaging, Storage & Formulations

• Storage: Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.
• Buffer: PBS (pH 7.4), 10% glycerol
• Preservative: No Preservative
• Concentration: 0.5 mg/ml
• Purity: >85%, by SDS-PAGE

Alternate Names for Recombinant Human CD74 Protein

• 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. Peptides and proteins are guaranteed for 3 months from date of receipt.

Bioinformatics

• Gene Symbol: CD74