Abstract
Calcium ion fulfills several criteria for identifying an intracellular messenger for light-adaptation in Limulus photoreceptors. Direct injection of Ca++ mimicks two aspects of light-adaptation; sequestration of intracellular calcium tends to prevent light-adaptation; and light induces an increase in intracellular Ca++ as demonstrated by two independent techniques.
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Brown, J.E. Calcium ion, a putative intracellular messenger for light-adaptation in Limulus ventral photoreceptors. Biophys. Struct. Mechanism 3, 141–143 (1977). https://doi.org/10.1007/BF00535809
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DOI: https://doi.org/10.1007/BF00535809