Although all anti-O2-antigen antibodies enabled activation of the complement system, anti-capsule antibodies were less effective in their stimulation and ability to to form hexameric IgG clusters.

The study data also indicated that anti-RBD IgG but not IgM was more important in complement activation following vaccination, where C5b-9 strongly and significantly correlated to the amount of ...

Different subclasses of IgG have approximately 90% similarity with respect to their amino acid structures, but each subclass has unique antigen binding methods, complement activation, immune ...

Cryoglobulins containing IgG, IgM and complement have been described in the serums of patients with SLE. 6 Such cryoglobulins have been found to have an anticomplementary effect, 8 and ...

IgG antibodies activate blood platelets and contribute to the severity of anaphylaxis. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2018 / 05 / 180515105707.htm ...

IgG antibodies activate blood platelets and contribute to the severity of anaphylaxis. Institut Pasteur. Journal Science Immunology DOI 10.1126/sciimmunol.aan5997 ...