Isotype-specific secondary antibodies for improved signal detection10 Apr 2019
Offers an alternative to cross-adsorbed secondary antibodies when absolute specificity is required.
Bio-Rad Laboratories has launched its isotype-specific secondary antibodies. This new range of recombinant monoclonal antibodies, directed against the three main mouse isotypes: IgG1, IgG2a, and IgG2b, offer improved signal detection and specificity in imaging, ELISA, flow cytometry, and western blotting.
Secondary antibodies are key components of antibody detection systems. The selection of an optimum secondary antibody can improve positive signals in addition to reducing false positive or negative staining. Recombinant monoclonal isotype-specific secondary antibodies detect individual isotypes, without species or isotype cross-reactivity, enabling multiple unlabeled mouse monoclonal antibodies of differing isotypes to be used simultaneously. This obviates the need to source secondary antibodies from other species. The isotype-specific antibodies offer an alternative to cross-adsorbed secondary antibodies when absolute specificity is required, for instance, during multiplexing or to prevent nonspecific background staining.
Bio-Rad’s recombinant monoclonal antibodies are generated using the Human Combinatorial Antibody Library (HuCAL) and CysDisplay, a proprietary method of phage display with guided selection methods to obtain highly targeted reagents. The recombinant production method also ensures consistent and secure supply.
“Recombinant human monoclonal antibodies are selected against epitopes unique to the isotype and offer significant advantages over traditional secondary antibodies,” said Tracey Long, Bio-Rad Marketing Manager, Life Science Group. “Bio-Rad’s recombinant monoclonal isotype-specific antibodies are easy to use and can be substituted for any secondary in the protocol without the need for extra steps,” she added.
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