ON THE MOLECULAR MECHANISM OF BIOLUMINESCENCE, II. LIGHT-INDUCED LUMINESCENCE

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Abstract
The bio-luminescent enzyme from Photobacterium fischeri which is normally activated in vitro by reaction with reduced flavin mononucleotide (FMNH2) and 02, in the presence of a long-chain aldehyde may also be activated by light. The intermediate may be similar to that produced by reaction with FMNH2. The light-induced reaction does not depend on flavin in the enzyme preparations, nor does the activation spectrum resemble that of a flavoprotein. Activation which may be carried out in the solid state at temperatures down to at least -100[degree]C, does not involve the diffusion of large molecules. Energy storage may take place by charge separation, and the excited state from which emission takes place may be associated with charge recombination.

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