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Time-dependent distances between the hydroxyl oxygen atom of the catalytic Ser78 of QeH and the carbonyl carbon atom of (R)/(S)-QE (A), and the representation of the catalytic triad of QeH and the substrate (R)/(S)-QE (B,C). The catalytic triad (Ser78, Lys81, and Tyr189) of QeH was in blue and green, whereas the (R)/(S)-QE was salmon.
