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   null (Ed.)

   Site specific introduction of the polar hydrophobic trifluoromethyl-λ 6 -tetrafluorosulfanyl (CF 3 SF 4 ) group can effectively control the secondary structure of a heptapeptide, the minimum repeat unit of an α-helix. The structural influence of CF 3 SF 4 -containing amino acid on the heptapeptide was established using NMR methods. 

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