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Articles
Action Spectrum for Developmental Photo-Induction of the Blue-Green Alga Nostoc muscorum
1 Department of Biology, University of Southern California, Los Angeles
The dark-grown cyanophyte requires a brief exposure to light from the 650 mµ region of the spectrum before it can complete its developmental cycle. Induction is reversed by exposure to green light. A blue protein, presumably allophycocyanin (absorption maximum, 650 mµ) has been demonstrated in aqueous extracts of the cyanophycean cells.
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Science. ISSN 0036-8075 (print), 1095-9203 (online)