Experimental (gray traces, noisy) and simulated (black traces, noiseless) photocurrents measured at −40 mV in a dark-adapted bass single cone. Photocurrents were elicited by 10-msec light flashes of intensity: 36, 71, 167, 356, 710, 1,744, 3,561, 7,106, and 17,443 VP*. The values of the parameters used to compute the simulated data are listed in Table 3 (Cone 1).