Western blots of total leaf extracts from plants infected with pTMV-CPTMV-iLOV and pTMV-CPTMV-G4S-iLOV showed only faint bands at the anticipated molecular weights of 30.5 and 31.4 kDa when probed with the TMV-specific antibody (Figure 3B) but strong signals when probed with the iLOV-specific antibody (Figure 3C), probably due to epitope access and weak systemic leaf infection. The gene discussed is ARSB; the disease is infection.