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SSNMR structures of CAP-Gly compared with X-ray structure 2HQH. A) The ensemble of the ten lowest-energy structures of CAP-Gly determined from MAS NMR distance restraints and backbone dihedral angle restraints using the Xplor-NIH structure calculation protocol. B) The average structure from the ensemble shown in A) (purple) overlaid with the X-ray structure 2HQH (grey). C) The back view of B), where the stretch T43-V44-A45 is highlighted to illustrate its position in the two structures.
