trans rescue of a mutant poliovirus RNA polymerase function

Abstract excerpt

A series of three-nucleotide insertions was engineered into the P2 and P3 coding regions of the T7 expression plasmid pT7(tau)-PV1, which encodes a full-length copy of poliovirus type 1 (Mahoney) cDNA. When RNA derived in vitro from these mutated templates was used to transfect HeLa cells, viable virus mutants were recovered. One mutant, Sel-3D-18, which contained a single amino acid insertion in the 3Dpol coding...

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