1. Recombinant Proteins
  2. Complement System
  3. Complement Regulatory Proteins

Complement Regulatory Proteins

Complement regulate proteins (Complement control proteins) are proteins that interact with components of the complement system. Complement activation leads to the induction of a number of potent immunological processes. It is not surprising that there are several mechanisms to prevent its uncontrolled activation. There are a series of complement control proteins expressed by the host to prevent the potentially damaging consequences. They regulate the complement cascade at different points. For example, C1 inhibitor (C1-INH) inactivates C1r and C1s, MASP-1, and MASP-2; MCP is the cofactor for factor I–mediated cleavage of C3b and C4b.

Cat. No. Product Name / Synonyms Species Source
  • HY-P72946
    Complement factor H/CFH Protein, Human (372a.a, HEK293, His)

    Complement factor H; H factor 1; CFH; HF; HF1; HF2

    Human HEK293
    Complement factor H/CFH proteins regulate complement activation and act as soluble inhibitors to prevent complement amplification on the cell surface. Complement factor H/CFH Protein, Human (372a.a, HEK293, His) is the recombinant human-derived Complement factor H/CFH protein, expressed by HEK293 , with C-His labeled tag. The total length of Complement factor H/CFH Protein, Human (372a.a, HEK293, His) is 372 a.a., with molecular weight of 55-60 kDa.
  • HY-P7861
    Complement Factor D/Adipsin Protein, Human (HEK293, His)

    rHuComplement Factor D/Adipsin, His; Complement factor D; CFD; Adipsin; C3 convertase activator; Properdin factor D; DF; PFD

    Human HEK293
    Complement factor D, also known as Adipsin, plays a crucial role in the alternative pathway of the complement system and when complexed with factor C3b, it cleaves factor B. This cleavage activates the C3bbb complex, converting it to the C3 convertase of the alternative pathway. Complement Factor D/Adipsin Protein, Human (HEK293, His) is the recombinant human-derived Complement Factor D/Adipsin protein, expressed by HEK293 , with C-10*His labeled tag. The total length of Complement Factor D/Adipsin Protein, Human (HEK293, His) is 228 a.a., with molecular weight of ~28.0 kDa.
  • HY-P72020
    CD46 Protein, Human (HEK293, hFc)

    AHUS2; Antigen defined by monoclonal TRA 2 10; Antigen identified by monoclonal TRA 2 10; CD46; TRA2.10

    Human HEK293
    CD46 Protein serves as a cofactor for complement factor I, safeguarding cells against complement-induced harm. It aids in sperm-oocyte fusion and acts as a T-cell costimulatory factor, facilitating the formation of T-regulatory 1 cells. These cells secrete interleukin-10, suppressing immune responses and preventing autoimmunity. Pathogens can exploit CD46's immune regulation abilities to induce an immunosuppressive state in T-cells. CD46 Protein, Human (HEK293, hFc) is the recombinant human-derived CD46 protein, expressed by HEK293 , with C-hFc labeled tag.
  • HY-P75394
    CD55/DAF Protein, Human (HEK293, hFc)

    Complement Decay-Accelerating factor; CD55; CR; DAF

    Human HEK293
    The CD55/DAF protein is critical in the immune system, recognizing C4b and C3b fragments, interfering with their enzymatic conversion and preventing the formation of complement cascade amplifying convertase. This regulatory mechanism alleviates complement-induced damage by inhibiting complement activation. CD55/DAF Protein, Human (HEK293, hFc) is the recombinant human-derived CD55/DAF protein, expressed by HEK293 , with C-hFc labeled tag. The total length of CD55/DAF Protein, Human (HEK293, hFc) is 319 a.a., with molecular weight of 95-105 kDa.
  • HY-P7861A
    Complement Factor D/Adipsin Protein, Human (HEK293, His, Solution)

    rHuComplement Factor D/Adipsin, His; Complement factor D; CFD; Adipsin; C3 convertase activator; Properdin factor D; DF; PFD

    Human HEK293
    Complement factor D, also known as Adipsin, plays a crucial role in the alternative pathway of the complement system and when complexed with factor C3b, it cleaves factor B. This cleavage activates the C3bbb complex, converting it to the C3 convertase of the alternative pathway. Complement Factor D/Adipsin Protein, Human (HEK293, His, Solution) is the recombinant human-derived Complement Factor D/Adipsin protein, expressed by HEK293 , with C-10*His labeled tag. The total length of Complement Factor D/Adipsin Protein, Human (HEK293, His, Solution) is 228 a.a., with molecular weight of ~28.0 kDa.
  • HY-P70055
    CFHR1 Protein, Human (HEK293, His)

    rHuComplement Factor H-related 1/CFHR1, His; Complement Factor H-Related Protein 1; FHR-1; H Factor-Like Protein 1; H-Factor-Like 1; H36; CFHR1; CFHL; CFHL1; CFHL1P; CFHR1P; FHR1; HFL1; HFL2

    Human HEK293
    CFHR1, a key complement regulator, actively engages in the finely tuned complement system. Dimerized CFHR1 demonstrates avidity for tissue-bound complement fragments, challenging CFH. It also associates with lipoproteins, suggesting involvement in lipid metabolism. With a unique head-to-tail homodimeric structure, CFHR1 forms heterodimers with CFHR2 or CFHR5, showcasing its versatile role in complement-related processes. CFHR1 Protein, Human (HEK293, His) is the recombinant human-derived CFHR1 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of CFHR1 Protein, Human (HEK293, His) is 312 a.a., with molecular weight of 38-50 kDa.
  • HY-P70102
    CFHR5 Protein, Human (HEK293, His)

    rHuComplement factor H-related protein 5/CFHR5, His; Complement factor H-related protein 5; CFHR5; CFHL5; FHR5

    Human HEK293
    CFHR5 is a first-line complement regulator that is actively involved in the complex dynamics of the regulatory system. Dimeric CFHR5 has significant affinity for tissue-bound complement fragments, thereby challenging CFH. CFHR5 Protein, Human (HEK293, His) is the recombinant human-derived CFHR5 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of CFHR5 Protein, Human (HEK293, His) is 551 a.a., with molecular weight of ~61.0 kDa.
  • HY-P72719
    CD59 Protein, Human (HEK293, His)

    CD59 glycoprotein; HRF-20; MAC-IP; MACIF; MIRL; CD59; MIC11; MIN1; MSK21

    Human HEK293
    The CD59 protein is a potent inhibitor of the complement membrane attack complex (MAC) and binds to assembled C8 and/or C9 complement, preventing the incorporation of multiple C9 copies that are critical for permeability pore formation. Its species-specific inhibitory effects extend to T cell activation, complexing with protein tyrosine kinases for signal transduction. CD59 Protein, Human (HEK293, His) is the recombinant human-derived CD59 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of CD59 Protein, Human (HEK293, His) is 77 a.a., with molecular weight of 15-20 kDa.
  • HY-P7876
    Complement Factor D/Adipsin Protein, Mouse (234a.a, HEK293, His)

    rMuComplement Factor D/Adipsin, His; Complement factor D; 28 kDa adipocyte protein; Adipsin; C3 convertase activator; Properdin factor D; Cfd; Adn; Df

    Mouse HEK293
    Complement Factor D/Adipsin Protein cleaves factor B in complex with factor C3b, activating the C3bbb complex to form the C3 convertase in the alternate pathway, analogous to C1s in the classical pathway. Complement Factor D/Adipsin Protein, Mouse (234a.a, HEK293, His) is the recombinant mouse-derived Complement Factor D/Adipsin protein, expressed by HEK293 , with C-6*His labeled tag. The total length of Complement Factor D/Adipsin Protein, Mouse (234a.a, HEK293, His) is 234 a.a., with molecular weight of 40-49 kDa.
  • HY-P7890
    Complement factor H/CFH Protein, Human (431a.a, HEK293, His)

    rHuComplement factor H/CFH, His; Complement factor H; CFH

    Human HEK293
    Complement factor H/CFH Protein, Human (431a.a, HEK 293, His) is a recombinant complement factor H (CFH) protein with His tag. Human complement factor H, a central complement control protein, is a member of the regulators of complement activation family.
  • HY-P70031
    CFHR2 Protein, Human (HEK293, His)

    rHuComplement factor H-related protein 2/CFHR2, His; Complement Factor H-Related Protein 2; FHR-2; DDESK59; H Factor-Like 3; H Factor-Like Protein 2; CFHR2; CFHL2; FHR2; HFL3

    Human HEK293
    CFHR2, a key complement regulator, competently rivals CFH by avidly interacting with tissue-bound complement fragments. It also associates with lipoproteins, hinting at a role in lipid metabolism. With a distinctive head-to-tail homodimeric structure, CFHR2 forms heterodimers with CFHR1 or CFHR5, showcasing its versatile involvement in the regulatory dynamics of the complement system. CFHR2 Protein, Human (HEK293, His) is the recombinant human-derived CFHR2 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of CFHR2 Protein, Human (HEK293, His) is 252 a.a., with molecular weight of 31 & (33-36) kDa, respectively.
  • HY-P7692
    HABP1/C1QBP Protein, Human (His)

    rHuHABP1/C1QBP, His; Complement component 1 Q subcomponent-binding protein, mitochondrial; HABP1

    Human E. coli
    HABP1/C1QBP Protein, Human (His) is a recombinant human HABP1 (hyaluronan-binding protein 1)/C1QBP (complement component 1, q subcomponent binding protein) produced in HEK293 cells, with His tag. HABP1/C1QBP is a ubiquitously present glycoprotein having specific affinity towards hyaluronan (HA).
  • HY-P7813
    Complement Factor B/CFB Protein, Human (HEK293, His)

    rHuComplement Factor B, His; Complement Factor B; C3/C5 Convertase; Glycine-Rich Beta Glycoprotein; GBG; PBF2; Properdin Factor B; CFB; BF; BFD

    Human HEK293
  • HY-P71726
    Complement Factor D/Adipsin Protein, Rat (P.pastoris, His)

    Cfd; Adn; Df; Complement factor D; EC 3.4.21.46; Adipsin; C3 convertase activator; Endogenous vascular elastase; Properdin factor D

    Rat P. pastoris
    Complement Factor D/Adipsin Protein is pivotal, cleaving factor B within the factor C3b complex to activate the C3bbb complex, serving as the C3 convertase in the alternate pathway—analogous to C1s in the classical pathway. Complement Factor D/Adipsin Protein, Rat (P.pastoris, His) is the recombinant rat-derived Complement Factor D/Adipsin protein, expressed by P. pastoris , with N-6*His labeled tag. The total length of Complement Factor D/Adipsin Protein, Rat (P.pastoris, His) is 238 a.a., with molecular weight (glycosylation form) of ~43 kDa.
  • HY-P72137
    CFB Protein, Mouse (His)

    Cfb; Bf; H2-BfComplement factor B; EC 3.4.21.47; C3/C5 convertase; Complement factor B Ba fragment; Complement factor B Bb fragment

    Mouse E. coli
    CFB is an important component of the alternative pathway of the complement system and is cleaved by factor D, producing two fragments: Ba and Bb. The Bb fragment is characterized as a serine protease and subsequently forms a complex with complement factor 3b, ultimately producing a C3 or C5 convertase. CFB Protein, Mouse (His) is the recombinant mouse-derived CFB protein, expressed by E. coli , with N-6*His labeled tag. The total length of CFB Protein, Mouse (His) is 739 a.a., with molecular weight of ~87 kDa.
  • HY-P72690
    CFHR4 Protein, Human (HEK293, His)

    Complement factor H-related protein 4; FHR-4; CFHR4; CFHL4

    Human HEK293
    CFHR4, a key regulator of complement, intricately orchestrates the complement system. It associates with lipoproteins, suggesting involvement in lipid metabolism. Operating as a homodimer, CFHR4 plays a crucial role in balancing complement activation and regulation. CFHR4 Protein, Human (HEK293, His) is the recombinant human-derived CFHR4 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of CFHR4 Protein, Human (HEK293, His) is 559 a.a., with molecular weight of 90-110 kDa.
  • HY-P72691
    CFHR3 Protein, Human (HEK293, His)

    Complement factor H-related protein 3; FHR-3; DOWN16; CFHR3; CFHL3

    Human HEK293
    CFHR3 Protein is implicated in regulating the complement system. CFHR3 Protein, Human (HEK293, His) is the recombinant human-derived CFHR3 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of CFHR3 Protein, Human (HEK293, His) is 312 a.a., with molecular weight of 43-56 kDa.
  • HY-P72721
    CD55/DAF Protein, Human (HEK293, His)

    Complement Decay-Accelerating factor; CD55; CR; DAF

    Human HEK293
    The CD55/DAF protein is critical in the immune system, recognizing C4b and C3b fragments, interfering with their enzymatic conversion and preventing the formation of complement cascade amplifying convertase. This regulatory mechanism alleviates complement-induced damage by inhibiting complement activation. CD55/DAF Protein, Human (HEK293, His) is the recombinant human-derived CD55/DAF protein, expressed by HEK293 , with C-6*His labeled tag. The total length of CD55/DAF Protein, Human (HEK293, His) is 319 a.a., with molecular weight of 50-75 kDa.
  • HY-P72723
    CD46 Protein, Human (HEK293, His)

    Membrane Cofactor Protein; TLX; CD46; MCP; MIC10

    Human HEK293
    CD46 protein is an important cofactor for complement factor I, a serine protease that protects autologous cells by cleaving deposited C3b and C4b. In addition to complement regulation, CD46 is involved in sperm-oocyte fusion during fertilization. CD46 Protein, Human (HEK293, His) is the recombinant human-derived CD46 protein, expressed by HEK293 , with C-6*His labeled tag. The total length of CD46 Protein, Human (HEK293, His) is 294 a.a., with molecular weight of 50-65 kDa.
  • HY-P74232
    Complement factor H/CFH Protein, Mouse (HEK293, Fc)

    Complement factor H; Protein beta-1-H; CFH

    Mouse HEK293
    Complement factor H (CFH) protein has C3b and heparin-binding activity and plays a multifaceted role in various processes such as organ development, complement activation, and vasculature development. It is present in different cellular compartments and expressed in different structures, including the adrenal gland, bone, central nervous system, humeral cartilage condensation, and metanephros. Complement factor H/CFH Protein, Mouse (HEK293, Fc) is the recombinant mouse-derived Complement factor H/CFH protein, expressed by HEK293 , with C-hFc labeled tag. The total length of Complement factor H/CFH Protein, Mouse (HEK293, Fc) is 378 a.a., with molecular weight of 80-94 kDa.
Cat. No. Product Name Effect Purity