Abstract
During growth of the freshwater cyanobacteria, Oscillatoria sp. BTCC/A0004, and Scytonema sp. TISTR 8208, a pink pigment is released into the growth medium. The pigment from each source had a molecular weight of approximately 250 kDa and had adsorption maxima at 560 and 620 nm. These results suggest that pink pigment is a phycoerythrin-like protein. It inhibited the growth of green algae, Chlorella fusca and Chlamydomonas reinhardtii, but not other cyanobacteria or true bacteria. The concentration at which growth inhibition 50% occurred was 0.5, 6 and more than 10 mg ml(-1), respectively.
MeSH terms
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Animals
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Bacterial Proteins / biosynthesis*
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Chlamydomonas reinhardtii / drug effects
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Chlamydomonas reinhardtii / growth & development
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Chlorella / drug effects
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Chlorella / growth & development
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Cyanobacteria / isolation & purification
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Cyanobacteria / metabolism*
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Fresh Water / microbiology*
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Growth Inhibitors / biosynthesis
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Growth Inhibitors / chemistry
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Growth Inhibitors / pharmacology
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Inhibitory Concentration 50
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Molecular Weight
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Oscillatoria / isolation & purification
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Oscillatoria / metabolism*
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Phycoerythrin / biosynthesis*
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Phycoerythrin / chemistry
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Phycoerythrin / pharmacology
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Pigments, Biological / biosynthesis
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Pigments, Biological / chemistry
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Pigments, Biological / pharmacology
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Spectrum Analysis
Substances
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Bacterial Proteins
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Growth Inhibitors
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Pigments, Biological
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Phycoerythrin