ATP-dependent bioluminescence in the firefly squid, Watasenia scintillans
- 1 July 1985
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 82 (14) , 4629-4632
- https://doi.org/10.1073/pnas.82.14.4629
Abstract
The Japanese firefly squid, Watasenia scintillans , emits intense flashes of light from three tiny luminous organs that are located at the tip of each of a pair of ventral arms. Light is also produced from hundreds of other minute organs that are scattered over the body. The luminescence is due to an ATP-dependent reaction, with an optimal pH of 8.80. The decay of light intensity follows first-order kinetics and the decay constant is independent of initial ATP concentration. The light emission also requires MgCl 2 , a soluble component, and an insoluble component that is membrane bound. Squids represent a major group of organisms unrelated to fireflies in which ATP is required for bioluminescence.Keywords
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