| rice ragged stunt oryzavirus genome segment s4 could encode an rna dependent rna polymerase and a second protein of unknown function. | the complete nucleotide sequence of genome segment s4 of rice ragged stunt oryzavirus (rrsv, thai-isolate) was determined. the 3823 bp sequence contains two large open reading frames (orfs). orf1, spanning nucleotides 12 to 3776, is capable of encoding a protein of m(r) 141,380 (p4a). the p4a amino acid sequence predicted from the nucleotide sequence contains sequence motifs conserved in rna-dependent rna polymerases (rdrps). when compared for evolutionary relationships with rdrps of other reovi ... | 1998 | 9787664 |