Monoclonal antibodies against Caprine arthritis-encephalitis virus epitopes in the p28 and p55gag viral proteins

► MAbs against CAEV were strongly reactive against p28 and its precursor p55gag. ► p28 contains a linear epitope detergent-stable, not altered by β-ME treatment. ► The epitope in p55gag was susceptible to denaturing treatments of SDS and β-ME. ► The findings suggest the p28 epitope is presented differently from p55gag epitope.