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Sequence alignment of engineered plastid TK from maize and TK from yeast. The numbering above the alignment corresponds to the enzyme from maize. Secondary structure elements found in maize TK are shown below the sequences. Identical residues (dark-blue background), conserved residues (light-blue background), and amino acid residues (red background) that are involved in cofactor binding (*) or metal binding (#) are indicated. The figure was drawn with ALSCRIPT (Barton, 1993).
