| Literature DB >> 2552175 |
S R Pollard1, G Dunn, N Cammack, P D Minor, J W Almond.
Abstract
Infectious cDNAs of the Sabin type 2 poliovirus vaccine virus and a vaccine-derived neurovirulent type 2 strain (P2/117) have been cloned in Escherichia coli. Nucleotide sequence analysis revealed that P2/117 differs from the vaccine strain by just 23 point mutations. Three occur in the 5' noncoding region. The remainder result in a total of 5 coding changes located in VP1, VP4, 2B, and 3D. The likely role of these mutations in the evolution to neurovirulence is discussed.Entities:
Mesh:
Substances:
Year: 1989 PMID: 2552175 PMCID: PMC251143 DOI: 10.1128/JVI.63.11.4949-4951.1989
Source DB: PubMed Journal: J Virol ISSN: 0022-538X Impact factor: 5.103