期刊
JOURNAL OF VIROLOGY
卷 74, 期 14, 页码 6394-6400出版社
AMER SOC MICROBIOLOGY
DOI: 10.1128/JVI.74.14.6394-6400.2000
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资金
- NIAID NIH HHS [N01AI40085] Funding Source: Medline
Poliovirus infectious RNA can be synthesized in vitro using phage DNA-dependent RNA-polymerases. These synthetic transcripts contain several extra nucleotides at the 5' end, which are deleted during replication to generate authentic viral genomes. We removed those 5'-end extra nucleotides utilizing a hammerhead ribozyme to produce transcripts with accurate 5' ends. These transcripts replicate substantially more rapidly in cell culture, demonstrating no lag before replication; they also replicate more efficiently in Xenopus laevis oocytes and in in vitro translation-replication cell extracts. In both systems, an exact 5' end is necessary for synthesis of positive-strand RNA but not negative-strand RNA.
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