5TM0:
reference: Multiple helical conformations of the helix-turn-helix region revealed by NOE-restrained MD simulations of tryptophan aporepressor, TrpR., Harish B, Swapna GV, Kornhaber GJ, Montelione GT, Carey J, Proteins. 2017 Apr;85(4):731-740. doi: 10.1002/prot.25252. Epub 2017 Feb 22. PMID: 28120439

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