Human IgG4 | AbD00264_hIgG4_Pro
Recombinant Human IgG4 Lambda (Mutant)
Human IgG4 lambda (mutant) isotype control is a fully human recombinant antibody with the mutation S228P in the core hinge region. It is recommended as a control for monoclonal antibody drugs of the same isotype.
- Product Type
- Recombinant Protein
- IgG4 Lambda
|Product Code||Applications||Pack Size||List Price||Quantity|
Clone AbD00264_hIgG4_Pro is specific for green fluorescent protein (GFP) and has no known reactivity with mammalian proteins or other antigens. This product is recommended for use as a standard in assays designed to measure IgG4 levels, or as a control antibody when using other human antibodies of the same isotype and subclass.
In addition to the tetrameric IgG structure, composed of two copies each of the heavy and light chains, wild type human IgG4 forms so-called half-molecules. This species contains only one heavy and one light chain. Half-molecules can assemble with an unrelated half-molecule to form bispecific tetrameric antibody species (Aalberse et al. 2002). Half-molecules of human IgG4 preparations can be detected as an additional species under denaturing, non-reducing conditions using SDS-PAGE, size exclusion chromatography or capillary electrophoresis. The serine to proline mutation at amino acid 228 in the core hinge region of IgG4 prevents the formation of half-molecules (Bloom et al. 1997). Recombinant Human IgG4 lambda (mutant) does not display this additional species; half-molecules cannot be detected in SDS-PAGE or by size exclusion chromatography.
In addition to the mutant recombinant, Bio-Rad also offers recombinant Human IgG4 lambda in its wild type form (HCA050). Recombinant Human IgG4 kappa is also available in both wild type (HCA195) and mutant form (HCA247).
- Product Form
- Human IgG4 antibody selected from the HuCAL GOLD phage display library and expressed in a human cell line - liquid
- Purified IgG prepared by affinity chromatography on Protein G
- Buffer Solution
- Phosphate buffered saline
- Preservative Stabilisers
- 0.01% Thiomersal
- Green fluorescent protein
- Approx. Protein Concentrations
- Antibody concentration 0.5 mg/ml
- This product is shipped at ambient temperature. It is recommended to aliquot and store at -20°C on receipt. When thawed, aliquot the sample as needed. Keep aliquots at 2-8°C for short term use (up tp 4 weeks) and store the remaining aliquots at -20°C.
Avoid repeated freezing and thawing as this may denature the antibody. Storage in frost-free freezers is not recommended.
- 12 months from date of despatch
- Entrez Gene
- GO Terms
- GO:0003823 antigen binding
- GO:0005576 extracellular region
- GO:0005624 membrane fraction
- GO:0006955 immune response
- Sold under license of U.S. Patents 6753136, 7785859 and 8273688 and corresponding patents. This antibody was developed by Bio-Rad, Zeppelinstr. 4, 82178 Puchheim, Germany.
- Licensed Use
- For in vitro research purposes only, unless otherwise specified in writing by Bio-Rad.
- For research purposes only
Applications of Human IgG4
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- Technical Advice
- Recommended protocols and further information about HuCAL recombinant antibody technology can be found in the HuCAL Antibodies Technical Manual
Useful Reagents Available
|Description||Product Code||Applications||Pack Size||List Price||Quantity|
|Recombinant Human IgG4 Lambda||HCA050||E||0.1 mg|
|Recombinant Human IgG4 Kappa||HCA195||E||0.1 mg|
|Recombinant Human IgG4 Kappa (Mutant)||HCA247||E||0.1 mg|
Product Specific References
Labrijn, A.F. et al. (2009) Therapeutic IgG4 antibodies engage in Fab-arm exchange with endogenous human IgG4 in vivo.
Nat Biotechnol. 27 (8): 767-71.
Wilkinson, I.C. et al. (2013) Monovalent IgG4 molecules: immunoglobulin Fc mutations that result in a monomeric structure.
MAbs. 5 (3): 406-17.
Aalberse RC & Schuurman J (2002) IgG4 breaking the rules.
Immunology. 105 (1): 9-19.
Bloom, J.W. et al. (1997) Intrachain disulfide bond in the core hinge region of human IgG4
Protein Sci. 6:407-415
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