1. Recombinant Proteins
  2. Complement System
  3. Complement Component 1
Cat. No. Product Name / Synonyms Species Source
  • HY-P71718
    C1QA Protein, Mouse (P.pastoris, His)

    C1qaComplement C1q subcomponent subunit A

    Mouse P. pastoris
    The C1QA protein helps form C1, the starting component of the serum complement system. C1q binds to the zymogens C1r and C1s, resulting in C1 assembly. C1QA Protein, Mouse (P.pastoris, His) is the recombinant mouse-derived C1QA protein, expressed by P. pastoris , with N-6*His labeled tag. The total length of C1QA Protein, Mouse (P.pastoris, His) is 223 a.a., with molecular weight of ~25.6 kDa.
  • HY-P72108
    C1QA Protein, Mouse (His-SUMO)

    C1qaComplement C1q subcomponent subunit A

    Mouse E. coli
    The C1QA protein helps form C1, the starting component of the serum complement system. C1q binds to the zymogens C1r and C1s, resulting in C1 assembly. C1QA Protein, Mouse (His-SUMO) is the recombinant mouse-derived C1QA protein, expressed by E. coli , with N-6*His, N-SUMO labeled tag. The total length of C1QA Protein, Mouse (His-SUMO) is 223 a.a., with molecular weight of ~39.6 kDa.
  • HY-P75464
    C1QB Protein, Human (sf9, His)

    Complement C1q subcomponent subunit B; C1QB

    Human Sf9 insect cells
    C1QB protein plays a vital role in assembling C1, the initial component of the serum complement system. C1q associates with proenzymes C1r and C1s, leading to C1 assembly. The collagen-like regions of C1q interact with the Ca(2+)-dependent C1r(2)C1s(2) proenzyme complex. Efficient C1 activation occurs when the globular heads of C1q engage with Fc regions of IgG or IgM antibodies within immune complexes. Active C1 forms a calcium-dependent trimolecular complex (C1q, C1r, and C1s) in a 1:2:2 molar ratio, with C1q comprising nine subunits—six disulfide-linked dimers of A and B chains and three disulfide-linked dimers of the C chain. C1QB Protein, Human (sf9, His) is the recombinant human-derived C1QB protein, expressed by Sf9 insect cells, with C-His labeled tag. The total length of C1QB Protein, Human (sf9, His) is 226 a.a., with molecular weight of ~30 kDa.
  • HY-P700696
    C1s/Complement component C1s Protein, Human (HEK293, His)

    Complement C1s subcomponent; C1 esterase;

    Human HEK293
    C1s/Complement component C1s, a serine protease and B chain, forms C1 with C1q and C1r, initiating the classical complement pathway. Activated by C1r, C1s then activates downstream components C2 and C4, crucially driving the complement system cascade. C1s/Complement component C1s Protein, Human (HEK293, His) is the recombinant human-derived C1s/Complement component C1s protein, expressed by HEK293, with C-His labeled tag. The total length of C1s/Complement component C1s Protein, Human (HEK293, His) is 673 a.a., with molecular weight of 55-60 kDa (light chain), 32-35 kDa (heavy chain).
  • HY-P75463
    C1s-A subcomponent Protein, Mouse (HEK293, His)

    Complement C1s-A subcomponent; C1 esterase; C1sa; C1s

    Mouse HEK293
    C1s-A subcomponent protein, a serine protease, is pivotal in the classical complement system pathway. Partnering with C1q and C1r, it forms C1, initiating complement activation. Activated by C1r, C1s can subsequently trigger downstream components C2 and C4, influencing the complement system cascade. C1s-A subcomponent Protein, Mouse (HEK293, His) is the recombinant mouse-derived C1s-A subcomponent protein, expressed by HEK293, with C-His labeled tag. The total length of C1s-A subcomponent Protein, Mouse (HEK293, His) is 673 a.a., with molecular weight of ~76.6 kDa.
Cat. No. Product Name Effect Purity