Human CellExp™ CD55/DAF, human recombinant

A membrane protein that regulates the complement system on the cell surface.
Catalog #: 7432 | abID: ab285860

Product Details

abID ab285860
Alternate Name CD55, DAF, CR, CROM, TC
Gene Symbol CD55
Gene ID 1604
Accession # P08174
Source HEK293 cells
Appearance Lyophilized
Physical Form Description Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally Mannitol or Trehalose is added as protectants before lyophilization.
Molecular Weight This protein is fused with 6×His tag at the C-terminus, has a calculated MW of 35.8 kDa. The predicted N-terminus is Asp 35 . DTT-reduced Protein migrates as 50-65 kDa due to glycosylation.
Purity by SDS-PAGE ≥95%
Endotoxin Level <1 EU/μg by LAL method
Biological Activity Measured by its binding ability in a functional ELISA. When rhCD55 is coated at 1 μg/ml (100 μl/well), the concentration of rhCD97 that produces 50% of the optimal binding response is found to be approximately 0.15­-2.0 μg/ml.
Reconstitution Instructions Centrifuge the vial prior to opening. Reconstitute in sterile PBS, pH 7.4 to a concentration of 50 µg/ml. Do not vortex. This solution can be stored at 2-8°C for up to 1 month. For extended storage, it is recommended to store at -20°C.
Handling Centrifuge the vial prior to opening.
Storage Conditions -20°C
Shipping Conditions Gel Pack
USAGE For Research Use Only! Not to be used in humans

Details

CD55, also known as DAF or decay accelerating factor, is a member of the RCA (regulators of complement activation) family characterized by four to 30 SCRs (short consensus repeats) in their plasma-exposed regions. CD55 /DAF is a 70 kDa membrane protein that regulates the complement system on the cell surface. It prevents the assembly of the C3bBb complex (the C3-convertase of the alternative pathway) or accelerates the disassembly of preformed convertase, thus blocking the formation of the membrane attack complex. This glycoprotein is broadly distributed among hematopoietic and non-hematopoietic cells. It is a determinant for the Cromer blood group system. CD55 is known to bind CD97 via the first SCR. It also binds physiologically generated C3 convertases with its second and third SCRs. Binding results in an accelerated “decay”, or dissociation of active C3 convertases, thus blocking the development of C’ attack complexes on non-foreign cells. Finally, viruses and bacteria are also known to utilize multiple SCR sites for infection.


Why buy BioVision Products?
Innovation
Affordability
Global Presence
Technical Support
BioVision aims to provide our customers innovative tools for accelerating drug discovery and biological research. BioVision offers >8,000 products including the most comprehensive array of assay kits for key targets in Metabolic pathways.
BioVision is committed to providing the highest quality products at a competitive price.
We have a broad network of global distributors who are ready to address your research needs and ensure fast delivery.
Our highly trained Technical Support team provides comprehensive product support and is dedicated to resolving your issues quickly and efficiently.