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Bio-Rad introduces isotype-specific secondary antibodies

Bio-Rad

New isotype-specific secondary antibodies promise improved signal detection and specificity in imaging

8 Apr 2019
Jack Godwin
Administrator / Office Personnel

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Bio-Rad Laboratories Inc., a global leader of life science research and clinical diagnostic products, has announced the launch of its isotype-specific secondary antibodies. This new range of recombinant monoclonal antibodies, directed against the three main mouse isotypes: IgG1, IgG2a, and IgG2b, offers 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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StarBright™ Blue 700 Fluorescent Secondary Antibodies

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StarBright™ Blue 520 Fluorescent Secondary Antibodies

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The StarBright Blue 520 Fluorophore is an ultra-sensitive polymer-based fluorophore with an excitation maximum at 488 nm and emission maximum at 520 nm. The StarBright Fluorophore is made up of multiple light-absorbing and -emitting monomers which provide an exceptionally bright signal compared to most traditional fluorophores.

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AntibodiesAntibodies are used in techniques such as confocal and fluorescence microscopy, flow cytometry, ELISA, ELISPOT, immunohistochemistry, western blotting and immunopreciptation. Select specific antigen reactivity, high specific affinity, low non-specific binding, monoclonal or polyclonal, primary or secondary antibodies and associated conjugates such as an enzyme or dye for visualization.Western BlottingWestern blotting equipment is used to transfer and identify specific proteins within a sample, reveal protein modifications, as well as give a semi-quantitative estimation of their concentration. Western blotting equipment includes all apparatus necessary to transfer proteins from gel to membrane and subsequent processing steps. Protein transfer can be performed by electroblotting with wet, semi-dry and dry transfer systems onto nitrocellulose and PVDF membranes. Blocking, washing and labeling of membranes follows, involving buffers, blocking reagents, blotting / incubation trays, labeling reagents, immunoblotting assays, antibodies and conjugates. Automated equipment for these steps is available to accelerate your lab workflow. Finally, detection and imaging of proteins can be conducted using gel documentation and imaging systems. Find the best western blotting equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.ELISAEnzyme-linked immunosorbent assays (ELISA), also known as enzyme immunoassays (EIA), are used for the detection and quantification of proteins, peptides and antibodies in a sample. ELISA often comes in kit format, with pre-selected antibody pairs to detect specific proteins or biomarkers of diseases such as diabetes and obesity, or cardiovascular and neurological disorders. Detection is made possible with chemiluminescent, fluorescent or colorimetric substrates and detection instruments such as microplate / ELISA readers. Other kits available include: Enzyme-linked immunospot (ELISPOT) assays for the quantification of protein-producing cells and chemiluminescent immunoassays (CLIA) kits. Find the best ELISA kits and products in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Flow Cytometry / Cell CountingFlow cytometers are used to count, sort and examine multiple characteristics of cells. Other cell analysis equipment includes image cytometers, cell counters, fluorescence-activated cell sorters (FACS), magnetic-activated cell sorters (MACS), and a range of flow cytometry assay kits. Flow cytometers can reveal information on cell viability, cell proliferation, apoptosis and cell cycle progression, as well as identify cell populations and intracellular or cell-surface molecules. Additionally, some flow cytometers, known as FACS, have an additional sorting function after analysis. Cell counters and image cytometers count live and dead cell populations and can also conduct cell proliferation assays. Find the best flow cytometers, cell counters and cell sorters in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.ImmunologyImmunological techniques measure and characterize immune responses. Immunology kits and analysis systems often use techniques such as ELISA, radioimmunoassay (RIA) and immunodiffusion assays, Immunohistochemistry, and flow cytometry. Immunologists use equipment such as flow Cytometers, plate readers, plate washers and fluorescent microscopes.ImmunoassayImmunoassays are laboratory tests that utilize antibody-antigen interactions to detect specific substances. They are widely used in diagnostics for detecting diseases, drug testing, and environmental monitoring. These assays offer rapid, sensitive, and precise detection of biomarkers, making them invaluable in clinical and research labs. Browse our peer-reviewed product directory to compare immunoassay systems, read user reviews, and get pricing directly from manufacturers.Monoclonal AntibodiesMonoclonal antibodies (mAbs) are lab-made molecules that can bind to specific antigens on cells, making them highly effective in treating cancers, autoimmune diseases, and infections. These targeted therapies are transforming the treatment landscape for many conditions. Browse our peer-reviewed product directory to find monoclonal antibodies for research and clinical applications; compare products, check reviews, and get pricing directly from manufacturers.ImmunologyImmunology is the branch of medical science that covers the study of all aspects of the immune system of multicellular organisms.ImagingImaging techniques are essential for obtaining visual representations of samples to understand structures, processes, and function in biological, chemical, and physical research. These tools range from traditional light microscopy to advanced imaging modalities like MRI and electron microscopy, providing researchers with valuable data for diagnostics, drug discovery, and material analysis. Explore imaging solutions in our peer-reviewed product directory to compare products, check reviews, and get pricing directly from manufacturers.Recombinant ProteinsSecondary AntibodiesFlow CytometryELISAEngineered AntibodiesEngineered antibodies are modified to enhance specificity, stability, and functionality for therapeutic and diagnostic applications. These antibodies are central to immunotherapy and biomarker detection. Compare engineered antibody solutions in our directory to find top products and reviews.

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