Simplot analysis of the ORF1-ORF2 overlap sequence (530 bp) of the strains VIR613F (MG023180)/ VIR699F (MG023186)/ VIR715F (MG023183) (a), VIR554F (MG023188) /VIR693F (MG023184) (b), VIR 138F (MG023190) (c), VIR 560 (MG023187) (d). The assay was performed using standards parameters of the program with a window size of 200 bp, a step size of 20 bp and with the Kimura (2-parameter) model. The accession numbers of the prototypes used in the analyses were the following: GII.P13/GII.13 (EU921354.2), GII.17/GII.17 (AY502009.1), GII.P22/GII.22 (AB233471), GII.P5/GII.5 (AF397156), GII.P7/GII.7 (JQ751043), GII.P6/GII.6 (AB039778), GI.Pb/GI.6 (AB081723), GI.6/GI.6 (AF093797), GI.Pb/GI.6 (AB354289). The y-axis indicates the nucleotide sequence similarity between the recombinant sequence and reference strains. The y-axis indicates nucleotide position.