Established in 1982, SouthernBiotech is one of the leading producers of affinity-purified secondary antibodies, immunochemicals, monoclonal antibodies, collagen and proteins in the United States. Based in Birmingham, Ala., the firm offers a plethora of products, including polyclonal antibodies/reagents, monoclonal/species specific secondary antibodies and cell surface proteins. Additionally, SouthernBiotech offers enzyme substrates, slide mounting reagents, epitope tags and filtered serum. It also provides several services in synthesis of multiple antigenic peptides, purification of synthesized peptide, evaluation of synthesized peptide by mass spectrometry and conjugation to carrier protein.