tailieunhanh - Preparation and characterisation of attenuated cold-adapted influenza A reassortants derived from the A/Leningrad/134/17/57 donor strain

Preparation and characterisation of attenuated cold-adapted influenza A reassortants derived from the A/Leningrad/134/17/57 donor strain presents the assay was capable of detecting interference where the infectivity ratio for A/Len/17 and A/Beij/32 was 1:7. Progeny viruses were characterised genetically by amplification of defined regions within each of the six internal genes by PCR and identification of the products by restriction enzyme analysis. | .

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