Human CD74 HEK293 Overexpression Lysate

Price:
Size:
Number:

Human CD74 HEK293 Overexpression Lysate: Product Information

Product Description
This Human CD74 overexpression lysate was created in HEK293 Cells and intented for use as a Western blot (WB) positive control. Purification of CD74 protein (Cat: 11091-H07H) from the overexpression lysate was verified.
Expression Host
HEK293 Cells
Species
Human
Sequence Information
A DNA sequence encoding the extracellular domain (Gln 73-Met 232) of human CD74 isoform b (NP_004346.1) was fused with a polyhistidine tag at the N-terminus.
Molecule Mass
The recombinant human CD74 consists of 176 amino acids and has a calculated molecular mass of 20.4 kDa. In SDS-PAGE under reducing conditions, the apparent molecular mass of rhCD74 is approximately 34 kDa due to glycosylation.

Human CD74 HEK293 Overexpression Lysate: Usage Guide

Preparation Method
Cell lysate was prepared by homogenization of the over-expressed cells in ice-cold modified RIPA Lysis Buffer with cocktail of protease inhibitors (Sigma). Cell debris was removed by centrifugation. Protein concentration was determined by Bradford assay (Bio-Rad protein assay, Microplate Standard assay). The cell lysate was boiled for 5 min in 1 x SDS loading buffer (50 mM Tris-HCl pH 6.8, 12.5% glycerol, 1% sodium dodecylsulfate, 0.01% bromophenol blue) containing 5% b-mercaptoethanol, and lyophilized.
Lysis Buffer
Modified RIPA Lysis Buffer: 50 mM Tris-HCl pH 7.4, 150 mM NaCl, 1mM EDTA, 1% Triton X-100, 0.1% SDS, 1% Sodium deoxycholate, 1mM PMSF.
Recommend Usage
1.  Centrifuge the tube for a few seconds and ensure the pellet at the bottom of the tube. 2.  Re-dissolve the pellet using 200μL pure water and boil for 2-5 min.
Sample Buffer
1 X Sample Buffer (1 X modified RIPA buffer+1 X SDS loading buffer).
Stability & Storage
Store at 4℃ for up to twelve months from date of receipt. After re-dissolution, aliquot and store at -80℃ for up to twelve months. Avoid repeated freeze-thaw cycles.
Application
Western Blot (WB)
Optimal dilutions/concentrations should be determined by the end user.

Human CD74 HEK293 Overexpression Lysate: Alternative Names

Human DHLAG Overexpression Lysate; Human HLADG Overexpression Lysate; Human Ia-GAMMA Overexpression Lysate; Human II Overexpression Lysate

CD74 Background Information

The cluster of differentiation (CD) system is commonly used as cell markers in immunophynotyping. Different kinds of cells in the immune system can be identified through the surface CD molecules which associating with the immune function of the cell. There are more than 32 CD unique clusters and subclusters have been identified. Some of the CD molecules serve as receptors or ligands important to the cell through initiating a signal cascade which then alter the behavior of the cell. Some CD proteins do not take part in cell signal process but have other functions such as cell adhesion. CD74, also known as HLA class2 histocompatibility antigen gamma chain and HLA-DR antigens-associated invariant chain, is a polypeptide involved in the formation and transport of MHC class2 protein. CD74 is expressed by B cells, macrophages, and Reed-Sternberg cells. When MHC class 2 protein was in the rough ER, its peptide-binding cleft was blocked by CD74 to prevent it from interacting with the endogenous peptides. CD74 also serves to facilitate MHC class2's export from ER.
Full Name
CD74 molecule, major histocompatibility complex, class II invariant chain
References
  • Zola H, et al. (2007) CD molecules 2006-human cell differentiation molecules. J Immunol Methods. 318 (1-2): 1-5.
  • Ho IC, et al. (2009) GATA3 and the T-cell lineage: essential functions before and after T-helper-2-cell differentiation. Nat Rev Immunol. 9 (2): 125-35.
  • Matesanz-Isabel J, et al. (2011) New B-cell CD molecules. Immunology Letters.134 (2): 104-12.
  • Moynes R, et al. (1997) A marker to distinguish atypical fibroxanthoma from malignant fibrous histiocytoma. Cancer. 79 (11): 2115-24.
  • Gabrielle FA, et al. (2008) Regulation of dendritic cell migration by CD74, the MHC class 2-associated invariant chain. Science. 322 (5908): 1705-10.
  • Leng L, et al. (2003) MIF signal transduction initiated by binding to CD74. JEM.197 (11): 1467-76.
Add to Cart Successfully Add to Cart Failed Shopping cart is being updated, please wait U.S.A.