Detection of the movement protein of red clover necrotic mosaic virus in a cell wall fraction from infected Nicotiana clevelandii plants.

The movement protein of red clover necrotic mosaic virus (RCNMV) was expressed in Escherichia coli as a fusion with a maltose-binding protein using the vector pMAL-cRI and used to produce an antiserum. The RCNMV movement protein was detected in a cell wall fraction obtained from infected Nicotiana clevelandii leaf tissue by immunoblotting using the movement protein antiserum. The movement protein could be detected 6 h after inoculation and reached a maximum after 24 h. In contrast, the virus capsid protein, detected in a soluble fraction by immunoblotting using a capsid antiserum, continued to increase for 72 h after inoculation.