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P08174-Human CD55 -3d structure.jpg P08174-Human CD55 -3d structure.jpg

Human CD55 +SDS-PAGE.jpg Human CD55 +SDS-PAGE.jpg Greater than 95% as determined by reducing SDS-PAGE.

Greater than 95% as determined by reducing SDS-PAGE.

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Recombinant Human CD55 (C-6His, HEK293) is a human-derived CD55 protein expressed in HEK293 cells and carries a C-terminal 6×His tag. Belonging to the RCA (Regulators of Complement Activation) family, this protein contains four SCR (short consensus repeat) domains and plays a key role in regulating the complement cascade. It can interact with CD97 and the C3 convertase through its SCR regions, thereby inhibiting the formation of the membrane attack complex and protecting host cells from complement-mediated damage. This protein is crucial for defense against pathogen infection.

Synonyms: Recombinant Human CD55 (C-6His, HEK293); Complement Decay-Accelerating factor; CD55

4.5 *For Research Use Only !

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Product Details of Human CD55 (C-6His, HEK293)

M.W : 36 KDa
SMILES Code : NONE
Synonyms :
Recombinant Human CD55 (C-6His, HEK293); Complement Decay-Accelerating factor; CD55

Safety of Human CD55 (C-6His, HEK293)

Isoform Comparison

Biological Activity

Description
CD55 is a member of the RCA (regulators of complement activation) family. RCA proteins is characterized by the presence of four to 30 SCRs (short consensus repeats also called CCPs for control protein modules) in their plasmaexposed regions. CD55 containing four SCR modules is involved in the regulation of the complement cascade. 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 nonforeign cells. It is known that viruses and bacteria also utilize multiple SCR sites for infection.
Protein Species Human
Expression System Human Cells
Tag C-6His
Protein Expression Interval Asp35-Ser353
Protein ID P08174
Endotoxin < 1 EU/µg as determined by LAL test.
Characteristics Lyophilized powder
Formulation Description Lyophilized from a 0.2 μm filtered solution of 20mM PB, 150mM NaCl, pH 7.4.
Reconstitution Method Always centrifuge tubes before opening.Do not mix by vortex or pipetting. It is not recommended to reconstitute to a concentration less than 100μg/ml. Dissolve the lyophilized protein in distilled water. Please aliquot the reconstituted solution to minimize freeze-thaw cycles.
For long-term storage, it is recommended to further dilute the product with a solution containing carrier proteins (e.g., 0.1% BSA, 10% FBS, or 5% HSA). For serum-free cultures or in vivo animal experiments where BSA, FBS, or HSA cannot be present in the cytokine preparation, trehalose may be used as an alternative carrier. Aliquots should be stored frozen at -20°C to -80°C.
Note: Low-adsorption tubes are recommended for aliquot storage, and repeated freeze-thaw cycles should be avoided. The dilution concentration for aliquoting should not be lower than 10 μg/mL, and the aliquot volume should be no less than 10 μL.
Aliquoted protein remains stable for up to 3 months when stored at ≤ -20°C.
 

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