•Nucleic Acid
-The Mr of the genome constitutes 5-5.075-5.15% of the virion by weight.
-Genome is monopartite and only one particle size of linear, positive-sense, single-stranded RNA is recovered.
-The genome is sequenced, and complete sequence is about 7100-13220-20000 nucleotides long.
-The 5'-end of the genome has a probably methylated nucleotide cap.
•Proteins
-Proteins constitute about 94.85% of the particle weight.
-The viral genome encodes structural proteins and non-structural proteins.