Complement C5 Protein, Human (HEK293, His)

Complement C5 is activated by C5 convertase, inducing C5-C9 assembly to form the membrane attack complex. The transient C6 binding site on C5b is critical for the formation of the cleavage complex. Complement C5 Protein, Human (HEK293, His) is the recombinant human-derived Complement C5 protein, expressed by HEK293 , with C-His labeled tag. The total length of Complement C5 Protein, Human (HEK293, His) is 1658 a.a., with molecular weight of 110-114 kDa (α chain) & 69-73 kDa (β chain), respectively.

Upon activation by a C5 convertase, Complement C5 initiates the spontaneous assembly of the late complement components, C5-C9, forming the membrane attack complex. The transient binding site for C6 on C5b is crucial for the foundation of the lytic complex. The proteolytic degradation of complement C5 produces C5a anaphylatoxin, a mediator of local inflammatory processes. C5a interacts with its receptor C5AR1, triggering diverse responses such as intracellular calcium release, smooth muscle contraction, increased vascular permeability, and histamine release from mast cells and basophilic leukocytes. Acting as a potent chemokine, C5a stimulates the locomotion of polymorphonuclear leukocytes and guides their migration toward sites of inflammation, contributing to the orchestration of immune responses.

Immobilized Human Complement C5, His Tag at 1 μg/mL (100 μl/well) on the plate. Dose response curve for Anti-Complement C5 Antibody, hFc Tag with the EC₅₀ of ≤21.4 ng/mL determined by ELISA.

Human

HEK293

C-His

P01031 (Q19-C1676)

727  [NCBI]

110-114 kDa (α chain) & 69-73 kDa (β chain)

Greater than 95% as determined by Tris-Bis PAGE.

Lyophilized powder

Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4. Normally 8% trehalose is added as protectant before lyophilization.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O.

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.