Antibodies for Assay Development

Having the right and high-quality antibody products for your application can mean the difference between success or failure. We have decades of experience servicing your specific application needs, from pre-validated antibodies for your lateral flow assay, to supporting your custom antibody development project to your target of choice. Our team will help find the product or solution to support your needs.
When selecting a partner for your custom or bulk antibody needs, it matters how and where the antibodies are made. At our facility in Allentown, PA, we have 30 years of experience building antibodies for rapid testing and lateral flow assays and an understanding of what is needed to support your assay needs. In Montgomery, TX, we handle and care for all our animals on site enabling us to develop, to your custom specifications, the antibody or other bulk product you require. At Fortis, the way we produce our antibodies makes all the difference, on-site production enables us with 100% control of the supply chain.
Scientist Extracting a Rack Tube With Urine Samples. Closeup of a Scientist Working With Urine Samples in Lab.
We make nearly every antibody and protein we offer – whether you need a bulk antibody, custom protein, custom recombinant rabbit monoclonal antibody, or polyclonal antibody, Fortis is here for you.

Antibodies Designed for Rapid Testing and Lateral Flow

Our technical staff has extensive experience specializing in rapid diagnostic test and reagent manufacturing. Satisfied customers worldwide have used our products in their manufacturing processes. We design, develop, manufacture, and market reagents for diagnostic kit manufactures.



Catalog Antibodies

Our current portfolio consists of ~10,000 catalog products, 8,500+ primary antibodies targeting thousands of protein targets and 1,300 secondary antibodies raised against immunoglobulins from dozens of host species. As the original manufacturer, we can provide these products in bulk quantities, and can customize the formulation to meet your exact needs.



Bulk Antisera

We are a provider of bulk antisera products to biologics and immunoassay tool manufacturers. We can also develop new materials or modify existing processes to meet your technical specifications for different applications.

  • IgG Fractions
  • Primary Antisera
  • Secondary Antibodies



Custom Antibody Development

Work with our experienced scientists to build the antibody you need for your application:

  • Custom Monoclonal Antibody: Rabbit recombinant & hybridoma-based monoclonal antibodies with highest level of reproducibility in your desired application(s).
  • Custom Polyclonal Antibody: Full service from synthesis of the peptide to delivery of your antisera or affinity purified antibody.