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Section of the chromatograms obtained by direct sequencing of the 194-bp RT-PCR products that were amplified from strains 1209/03 (A), 1209/03-E5 (B) and 1209/03-E10 (C). This section corresponds to nucleotide positions 1,006 to 1,038 of the HA gene. Positions containing mixed peaks are indicated by vertical arrows. Nucleotide and predicted amino acid sequences are shown under the chromatogram.
