Whereas a primary antibody is raised against a specific target antigen such as proteins, peptides or other antigenic molecules, secondary antibodies are raised to bind to primary antibodies or their associated fragments and regions. The high specificity of secondary antibodies makes them extremely useful in laboratory and industrial applications. Secondary antibodies are produced in monoclonal and polyclonal forms with specificity for the vast majority of primary antibodies and their fragments. Fluorescent/radioactive/molecular labels, tags and probes conjugated to secondary antibodies further increase their usefulness in laboratory applications. Indirect detection of a target molecule with secondary antibodies by binding to a primary antibody which in turn binds to the target has the advantage of massively increased sensitivity due to the extra signal amplification from multiple secondary antibodies binding to the single primary antibody; this has valuable applications in quantitative and qualitative assays, purification processes and more. Fitzgerald Industries offers a vast range of secondary antibodies for sale. Our monoclonal and polyclonal secondary antibodies are available from all commonly utilized host species. Our high quality antibodies are available in purified forms or conjugated to the full range of tags and labels such as biotin, horseradish peroxidase (HRP), fluorescein isothiocyanate (FITC), alkaline phosphate and others. IgG, IgM, IgE, IgA, and IgD raised in avian and mammalian hosts as well as Fc specific, Fab and Fab’2 fragments and light, heavy, lambda and gamma chains are available. Fitzgerald’s range of secondary antibodies is the ideal choice for ELISA, Immunoblotting, Flow Cytometry, Lateral flow and immunoassays and are available in bulk quantities or smaller sizes and titres. Our catalog is constantly updated with new targets so please do not hesitate to contact us with your requirements.