Schematic diagram of the MFSV genome organization. The open reading frames (block arrows) are derived from the antigenomic sequence. The asterisks indicate gene junctions (Fig. 3). Bold lines indicate locations of probes A, B, C, D, E, F, and G used for Northern blot hybridization of mRNAs of ORF1, -2, -3, -4, -5, -6, and -7, respectively (Fig. 5).