Rhodopsin Photoproducts: Effects on Electroretinogram Sensitivity in Isolated Perfused Rat Retina

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Science  02 Aug 1968:
Vol. 161, Issue 3840, pp. 487-489
DOI: 10.1126/science.161.3840.487


Isolated perfused retinas of albino rats were exposed to brief saturating flashes of white light which bleached about 50 percent of the rhodopsin present. Transient photoproducts of the reaction could be detected for about 30 minutes. The b-wave threshold increased by some 3 logarithmic units immediately after the flash and remained stable at this level thereafter. This suggests that the longer-lived intermediate products of rhodopsin photolysis do not influence scotopic visual sensitivity.

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