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Peptide recognition of heptameric and hexameric fragaceatoxin C. The fit of the residual current is shown for leucine-enkephalin (YGGFL), angiotensin II (4–8) (YIHPF), and kemptide (LRRASLG) each in 10 μM concentration, recorded under an applied potential of −70 mV. Traces were collected in 1 M KCl and 50 mM citric acid titrated with bis-tris propane to pH 3.8 at a sampling frequency of 50 kHz, using a 10 kHz Bessel filter and 5 kHz Gaussian filter.
