Like IgG1, IgG3 activates complement and has an affinity for fc receptors; thus IgG1 and IgG3 are the more effective of the IgG subclasses. An IgG3 deficiency is associated with Wiscott-Aldrich disease, systemic lupus erythematosus, juvenile diabetes mellitus, and peridontal infections. IgG anti-viral antibodies are restricted to IgG subclasses 1 and 3, with IgG3 antibodies being the first to appear in response to infection.
Prepared from plasma shown to be non reactive for HBsAg, anti-HCV, anti-HBc, and negative for anti-HIV 1 & 2 by FDA-required tests.
Constant region of immunoglobulin heavy chains. Immunoglobulins, also known as antibodies, are membrane-bound or secreted glycoproteins produced by B lymphocytes. In the recognition phase of humoral immunity, the membrane-bound immunoglobulins serve as receptors which, upon binding of a specific antigen, trigger the clonal expansion and differentiation of B lymphocytes into immunoglobulins-secreting plasma cells. Secreted immunoglobulins mediate the effector phase of humoral immunity, which results in the elimination of bound antigens. The antigen binding site is formed by the variable domain of one heavy chain, together with that of its associated light chain. Thus, each immunoglobulin has two antigen binding sites with remarkable affinity for a particular antigen. The variable domains are assembled by a process called V-(D)-J rearrangement and can then be subjected to somatic hypermutations which, after exposure to antigen and selection, allow affinity maturation for a particular antigen.
Post-translational: N-linked glycans at Asn-322 are noncore fucosylated and the vast majority are diantennary species with a bisecting GlcNAc. Among them the most dominant glycans are HexNAc5Hex4, HexNAc5Hex5, and HexNAc5Hex5Sia1.1 PublicationN-linked glycans at Asn-227 are diantennary core fucosylated structures without bisecting GlcNAc (HexNAc4Hex4Fuc1, HexNAc4Hex5Fuc1, and HexNAc4Hex5Fuc1Sia1). Glycosylation on Asn-227 is required for interaction with Fc receptors and ability to activate the complement pathway. (Microbial infection) Deglycosylation on Asn-227 by S.pyogenes EndoS or Endos2 endoglucosidases prevents interaction between immunoglobulin-gamma (IgG) and Fc receptors, impairing ability to activate the complement pathway. O-linked glycans are non-, mono- and disialylated core 1-type O-glycans.
种属
人(Human)
来源
天然
预测分子量
170 kDa
分子类型
蛋白质
产品线
生物产品
储存与运输
物理形态
液体
储存缓冲液
20 mM Phosphate buffer, 150 mM NaCl, 0.05% Sodium azide, pH 7.4 .
ZJ26F0434034
危险品化学品经营许可证（带存储）