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Water accessibility of monomeric (○) and oligomeric (■) TatA amides as a function of residue number as determined by resonance broadening because of addition of water-soluble Mn+2EDDA−2. A decrease in the ratio (I/Io) of the peak intensity after (I) and before (Io) addition of Mn+2EDDA−2 indicates increased water accessibility. Average values for the two side-chain amide resonances of Gln8 are indicated.
