Immunogold labelling of LIYV virions, treated with (A), antiserum to the CP; (B) and (C), antiserum to the CPm; (D) pre-immune antiserum. Labelling was done with 10-nm gold particles conjugated with goat anti-rabbit antibodies to (A), CP; (B) and (C), CPm. Arrow in (A) indicates a virion terminal region not coated with CP antiserum. Arrows in (B) and (C) indicate virion termini coated with CPm antiserum. Bars represent 224 nm. Reprinted with the permission of the Society for General Microbiology from Tian et al. (1999).