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(...) Discrimination of CTV isolates by CTV-MCA13 was similar in indirect ELISA with plate-trapped antigen and in double antibody sandwich indirect ELISA with antigen trapped on polyclonal antibody-coated plates. Results of immunoelectron microscopy suggest that CTV-MCA13 may react to a cryptic epitope on the viral coat protein. The monoclonal antibody is an IgG2a immunoglobin and did not react to extracts of healthy citrus or citrus infected with other viruses
T. A. Permar (Mon,) studied this question.