FIGURE 2.

Schematic representation of plant viruses and their proteolytic cleavage sites. Triangles represent cleavage sites of endopeptidases. Colors of the Continuedtriangles match the colors of the corresponding endopeptidases: orange for cysteine, blue for serine, yellow for aspartic, purple for unknown and green for plant proteases; only genomes, or sub-genomes encoding polyproteins subject to proteolytic cleavage are depicted. For each family, a representative species covering the different endopeptidases are depicted. TSWV is included as representative member of the order Bunyavirales. Scale of the genome map is maintained only within each viral species. Dotted lines used in the Endornaviridae family indicate that processing is only theoretical. Question mark indicates that the way of processing is unknown. PPV, Plum pox virus, Potyvirus; CVYV, Cucumber vein yellowing virus, Ipomovirus; BaYMV, Barley yellow mosaic virus, Bymovirus; SMoV, Strawberry mottle virus, unassigned; PLRV, Potato leafroll virus, Polerovirus; SeMV, Sesbania mosaic virus, Sobemovirus; TYMV, Turnip yellow mosaic virus, Tymovirus; BYV, Beet yellow virus, Closterovirus; CTV, Citrus tristeza virus, Closterovirus; BBScV, Blueberry scorch virus, Carlavirus; BNYVV, Beet necrotic yellow vein virus, Benyvirus; CeMV, Cucumis melo alphaendornavirus, Alphaendornavirus; TSWV, Tomato spotted wilt orthotospovirus, Orthotospovirus; AthAtRV, Arabidopsis thaliana AtRE1 virus, Pseudovirus; AthAthV-At, Arabidopsis thaliana Athila virus, Metavirus; CaMV, Cauliflower mosaic virus, Caulimovirus.