IgG1 Protein is the most abundant Immunoglobulin G (IgG) subclass in human sera and is important for mediating antibody responses against viral pathogens. IgG1 enables antigen binding activity and immunoglobulin receptor binding activity. It acts upstream of or within several processes, including antibody-dependent cellular cytotoxicity, phagocytosis, and positive regulation of immune response. IgG1 Protein, Mouse (HEK293, C102S) is the recombinant mouse-derived IgG1 protein, expressed by HEK293 , with tag free.