The PCR product (298bp) was purified by QIAquick Gel Extraction Kit (Qiagen, Germany). The sequencing ofPCR product nucleotides was performed in both directions with the help of capillary electrophoresis using a laserinducedphosphorescence detector and an automated genetic analyser “CEQ™ 8000 Genetic Analyzer” (BeckmanCoulter, USA) at the Department of Biology and Wildlife Diseases, University of Veterinary and PharmaceuticalScience Brno, Czech Republic. Phylogenetic analysis was performed from the obtained nucleotide sequence ofthe F protein gene including the F0 “cleavage site” and deduced amino acid sequence compared with sequencesin GenBank using AlignX program (Vector NTI, 5.5, INFORMAX, inc.)
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