Table 1.

Proteins of the different ORFs with sizes (kDa) and possible function(s).

ORF	Luteovirus	Polerovirus	Enamovirus	Function of product
0	NA	28-30	34	possible membrane-linked replication factor
1	39–42	66–72	84	helicase motifs in luteoviruses; protease and VPg in poleroviruses
2	60–62	65–72	67	probable RdRp
3	22	22–23	21	CP gene
4	16–21	17–21	NA	probable MP
5	43–59	50–56	29	possible aphid transmission or virus particle stability factor
6	4–7	7–9	NA	unknown