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In this Letter, Fig. 2h displays minimal models for recovery from inactivation to guide thinking about the associated single-channel behaviours for control (top trace), in the presence of l-peptide (next two traces), and in the presence of d-peptide (bottom two traces). The model for recovery from inactivation by the L-peptide inadvertently read instead of . This error has no effect on any of our analyses or conclusions. Figure 2h has been corrected in the PDF and HTML versions of this Letter.