Bethyl Laboratories, Inc. We specialize in custom antibodies and custom affinity purified antibodies, whether they be anti-peptide antibodies, phospho-specific antibodies, or antibodies to customer’s protein. The company provides quality antibody products and services for both clinical and research applications. The company tests antibodies in a wide range of applications including ELISA, western blot, immunoprecipitation, immunohistochemistry and immunocytochemistry. All antibodies are produced and affinity purified by antigen specific affinity chromatography at its sole facility in Montgomery, TX.