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Alignment of the deduced amino acid sequences of teleost Ddx3 genes. Identical amino acids are in gray background. Amino acid sequences with identical underline are encoded by the same exon. Numbers 1−10 stand for the ten exons of uniform size and position in both Ddx3a and Ddx3b genes. The 12 conserved motifs characteristic of DEAD-box proteins are boxed. Amino acid sites under positive selection are in yellow background. Asterisk stand for posterior probability > 0.95.
