Direct correlation between the R2 component of the early receptor potential and the formation of metarhodopsin II in the excised bovine retina.

The formation of Metarhodopsin II, measured spectroscopically in the excised bovine retina at 37 degrees C, can be described by the sum of two exponentials. The R2 response of a simultaneously recorded early receptor potential can be matched by the difference of two weighted exponentials, whose time constants are identical to those obtained for the spectroscopic signal.