Product Type
Antibody
Description
The polyclonal antibody recognizes human complement factor H-related protein 4 (FHR4). The complement system is the first line of defense against pathogens, helping to eliminate apoptosis and damaged cells. Complement factor H (fH) is an abundant plasma protein that can negatively regulate the alternative pathway and C3b amplification loop. In addition to fH, the proteins encoded by the fH gene family include five fH-related proteins (FHR1-5), which are encoded by closely connected but unique genes. Like fH, these proteins are composed of repetitive short consensus repeat sequences (SCR). fH competes with fB to bind to C3b and C3b (H2O), thereby preventing the formation of invertase, accelerating the degradation of C3 invertase, and is a cofactor of fI. The function of FHR protein is unclear. FHRs are mainly produced in the liver and secreted in the plasma. FHR4 binds to the C3d region of C3b. In contrast to fH, FHR4-C3b interaction promotes complement activation. Two transcripts of the FHR4 gene exist: FHR4B and FHR4B, which are composed of 9 and 5 SCRs (86 and 42 kDa) respectively. The two variants have different binding profiles for C3b. The proposed FHR4 complement activating ligand is pentameric CRP.
Disease
Infectious diseases, Nephrology
Size
100 µg
Immunogen
Recombinant FHR4 fragment SCR2-4
Species
Human
Clonality
Polyclonal
Buffer
PBS, containing 0.1% bovine serum albumin and 0.02% sodium azide.
Application
Immuno assays, Western blot
Application Notes
The diluent used depends on the detection system used. It is recommended that users test reagents and determine their own optimal dilution. The typical initial working dilution is 1:50.
Storage Instructions
Product should be stored at 4°C. Under recommended storage conditions, product is stable for at least one year.
Alternative Names
Complement factor H-related protein 4; FHR-4
