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Comparison of EGFP and CatchER(apo) at the chromophore and nearby residues. Residues 202–206 of EGFP and CatchER(apo) are shown as sticks in gray and yellow, respectively. Ser202/Asp202 and Gln204/Glu204 label mutated residues in EGFP/CatchER(apo). The main chain from residues 202–206 shifts with a maximum value of 0.8 Å as indicated by the arrow.
