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Secondary structures of Spinach and Broccoli aptamers used in this study. DFHBI is shown as a green box. Grey boxes are the bases deleted in the ‘mini’ versions of Spinach and Spinach2. Red bases are the sites of mutations that transform Spinach into Spinach1.2 and 2. Blue and pink base pairs are those specific for Spinach2 and Baby Spinach, respectively.
