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Biophysical Journal 51: 843-845 (1987)
© 1987 the Biophysical Society

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Linear gramicidins at the air-water interface.

N D Mau, P Daumas, D Lelièvre, Y Trudelle and F Heitz

ABSTRACT

The behavior of four linear gramicidins, which differ by the nature of their 9, 11, 13, and 15 aromatic residues, together with a covalent "head to tail" retro GA-DAla-GA dimer, has been examined at the air-water interface. It is shown that all four "monomers" have almost the same molecular area, which is compatible with either a single-stranded or a double-stranded helical model, whereas it is suggested that retro GA-DAla-GA could adopt another conformation. The surface potential measurements agree with those of different groups of molecules characterized by their single-channel behaviors.






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Copyright © 1987 by the Biophysical Society.