Nucleotides That Align with the Most Frequent Combinations of Amino Acids at Positions 6 and 1′.

<p>Nucleotides aligned with each 6/1′ combination in the alignments in <a href="http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1002910#pgen.1002910.s001" target="_blank">Figure S1</a> were used to construct sequence logos <a href="http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1002910#pgen.1002910-Crooks1" target="_blank">[30]</a>. Only P motifs were used in this analysis. Each logo shows the aligned nucleotide (0) and the preceding (−1) and succeeding (+1) nucleotides. 25, 23, 102, 86 and 16 alignments were used to generate the T₆N_1′, T₆D_1′, N₆D_1′, N₆N_1′ and N₆S_1′ logos, respectively.