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Purple bacteria could be key to finding alien lifeCoelho and her colleagues grew 20 species of purple sulfur-producing bacteria and 20 species of purple non-sulfur-producing bacteria. These were obtained from a variety of environments.
They may be divided into two groups – purple sulfur bacteria ( Chromatiales) and purple non-sulfur bacteria ( Rhodospirillaceae). Purple bacteria are anoxygenic phototrophs widely spread in nature, ...
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