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Nucleotide sequence alignment for six laboratories. The VQA Sanger sequencing (SS) consensus is shown at the top. Mixtures of A and G (R) or C and T (Y) that were reported by some but not all laboratories are highlighted in blue. The sequences from laboratories 5, 7, and 8 did not contain any mixtures in this region, and those from laboratory 4 contained the Y in codon 221 at all thresholds reported (5%, 10%, and 15%).
