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Trinucleotide preferences of the investigated A3 proteins. For each A3 protein, the observed mutations within the 10 sequenced clones in a C-containing context (NNC-to-NNT mutations) were analyzed; they are listed here as proportions of mutations and are arranged from the most to the least preferred sequence. Error bars represent 95% confidence limits based on binomial distribution (exact Clopper-Pearson confidence intervals).
