Effector protein (PubMed:21691787, PubMed:24080193, PubMed:24337817). Elicits a hypersensitive response (HR) in tobacco plants (N.tabacum) and cotton (G.hirsutum) (PubMed:21691787, PubMed:24080193, PubMed:24337817). Boosts systemic acquired resistance (SAR) to tobacco mosaic virus (TMV) infection in N.tabacum and to V.dhaliae infection in primed cotton seedlings (PubMed:21691787, PubMed:24080193, PubMed:24337817). Monomer (PubMed:22750869). Interacts with Arabidopsis thaliana NRP (PubMed:28633330). The N-terminal region (1-98) is sufficient for induction of SAR of N.tabacum to TMV infection. The C-terminal region (99-155) is sufficient for eliciting HR in N.tabacum.