Immunoglobulin G4 (IgG4), Normal Human Plasma

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MW: 146,000 Da
Extinction Coefficient: 1.36

Frozen in 20 mM phosphate, pH 7.4, with 150 mM NaCl and 0.05% NaN3.

IgG4 antibodies will dominate the IgG response in schistosomiasis, lymphatic filariasis, and in patients after allergen immunotherapy. Unlike the other IgG subclasses, IgG4 does not activate complement. A combined IgA-IgG4 deficiency has been associated with recurrent pyogenic infections.

Storage: <= -20°C

Purity: >=95% by SDS-PAGE.

Prepared from human plasma shown to be non reactive for HBsAg, anti-HCV, anti-HBc, and negative for anti-HIV 1 & 2 by FDA-required tests.

Athens Research & Technology products are laboratory reagents and are not to be administered to humans or used for any drug purpose. For research or further manufacturing use only.

Product Citations:
Devaux JJ, Miura Y, Fukami Y, Inoue T, et al. Neurofascin-155 IgG4 in chronic inflammatory demyelinating polyneuropathy. Neurology. 2016 Mar 1;86(9):800-7. doi: 10.1212/WNL.0000000000002418. Epub 2016 Feb 3.

IgG Subclasses and Isotypes of VH4-34 Encoded Antibodies. Bhat NM, Kshirsagar MA, Bieber MM, and Teng NNH. Immunol Invest. 2015;44(4):400-10. doi: 10.3109/08820139.2015.1015682.

Swisher JFA, et al. IgG4 can induce an M2-like phenotype in human monocyte-derived macrophages through FcγRI. MAbs. 2014;6(6):1377-84. doi: 10.4161/19420862.2014.975657.