Both photons and fluoride ions excite limulus ventral photoreceptors

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Science  06 Apr 1979:
Vol. 204, Issue 4388, pp. 77-79
DOI: 10.1126/science.34877


Illuminating Limulus ventral photoreceptors with dim light results in a response composed of discrete waves. In the dark, adding 10 mM sodium fluoride to the artificial seawater that bathes the photoreceptor includes discrete waves. The fluoride-induced waves are similar to those evoked by light. These findings suggest that fluoride induces a process similar or identical to visual excitation of the photoreceptor.