Phycochromes b and d: their occurrence in some phycoerythrocyanin-containing blue-green algae (cyanobacteria) |
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Authors: | G. S. BJÖ RN |
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Affiliation: | Department of Plant Physiology, University of Lund, Box 7007, S-220 07 Lund, Sweden |
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Abstract: | Abstract Phycochromes b and d, two types of photoreversibly photochromic pigments previously extracted from the blue-green alga Tolypothrix distorta , which contains phycoerythrocyanin, have now been found in three Anabaena strains also containing phycoerythrocyanin. Tests for the presence of phycochromes b and d in a number of blue-green algae lacking phycoerythrocyanin have been negative. The possibility that phycochrome b-type absorbance changes are due to changes in the α-subunit of phycoerythrocyanin is discussed. |
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Keywords: | Blue-green algae cyanobacteria phycoerythrocyanin photochromic |
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