| sequence analysis demonstrates that onion yellow dwarf virus isolates from china contain a p3 region much larger than other potyviruses. | the complete sequence of an isolate of onion yellow dwarf virus (oydv) from yuhang, zhejiang province, china, was determined. it was 10538 nts in length and was predicted to encode a polyprotein 3403 amino acids (aa) long with a calculated m(r) of 385.1 kda. the predicted p3 protein (530 aa) was larger than that of any of the potyviruses sequenced to date (344-378 aa). the additional sequence occurs at the n-terminus of the protein, does not represent a duplication from elsewhere in the oydv gen ... | 2003 | 12756621 |