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A new approach for the determination of the bilayer location of Trp residues in proteins has been applied to the study of the membrane topology of the channel-forming bacteriocin, colicin E1. This method, red-edge excitation shift (REES) analysis, was initially applied to the study of 12 single Trp-containing channel peptides of colicin E1 in the soluble state in aqueous medium. Notably, REES was...
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