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Aa and Ba, current responses of a rod-dominated DBC (DBCR) (A) and a cone-dominated DBC (DBCC) (B) to 500 nm and 700 nm light steps of various intensities (labelled in log unit of attenuation on the left of each current trace). Ba and Bb, the response—intensity relations of the current responses. For the criterion response of 10 pA marked by the horizontal dashed line, ΔS for the DBCR is 3.1 log units and for the DBCC is 0.8 log unit.
