The detection of PR (b) protein and TMV by ELISA in systemic and localised virus infections of tobacco

Abstract
An antiserum was prepared to the b1 protein purified from TMV infectedN. tabacum cv. Xanthi-nc leaves and used to study PR proteins. The Xanthi-nc proteins b2 and b3 were shown to be serologically closely related to b1. Antisera to b1 protein and TMV were used in a F(ab′)2 enzyme linked immunosorbent assay to monitor PR protein and TMV concentrations, respectively, during the first 6 days of a systemic TMV infection (cv. Xanthi) and a localised TMV infection (cv. Xanthi-nc).