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Cartoon representation of the MsrA02 structure (PDB: 3PIL) with the residues involved in the catalytic cycle of 1a highlighted. Residues with resonances undergoing significant intensity losses upon the addition of 0.5 mM or 1 mM of 1a are labeled in blue or red, respectively. Residues with resonances undergoing significant chemical shift differences between the free and bound forms are labeled in cyan. C25 and C176 sidechains are shown for clarity.
