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Biophysical characteristics of slow ACR mutants. A–D, Normalized photocurrent decay after 1-s illumination recorded from wild-type ACRs (black) and their respective mutants in which the residue homologous to Cys-102 (GtAR1 numbering) was mutated to Ala (red). E, F, Photocurrent half-decay times (E) and peak photocurrent amplitudes (F) measured in wild-type ACRs and their indicated mutants. The data points are mean ± SEM (n = 5–12 cells; for exact numbers, see in Table 5).
