Sliding-window Simplot graph showing genome-wide comparison of Grapevine leafroll-associated virus 2, strain SG (GLRaV-2-SG) with other strains of GLRaV-2 (OR1, 93/955, BD and RG; GenBank: FJ436234; NC007448; DQ286725; NC004724). The Simplot was generated using multiple sequence alignment of all strains with a window size of 200 nt and a step size of 20 nts. Diagrammatic representation of the GLRaV-2 genome with location of 9 open reading frames (ORFs) from 5′ to 3′ are shown above the graph. See Martelli et al.  for details of genome organization of the virus.