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Hypothetical Types of Biochemistry (wikipedia.org)
49 points by occamschainsaw on May 21, 2020 | hide | past | favorite | 7 comments

> Non-green photosynthesizers

We actually have non-green photosynthesizers on Earth: purple ones. There are a variety of reasons why, but one is that it is more optimal in shade (green is certainly more efficient for direct sunlight from Sol).

I think the evidence is high that existing higher plant photosynthesis (Photosystem I + Photosystem II) is a merger of purple photosynthesis with Chloroflexus photosystem (possibly via horizontal transfer). IIRC Photosystem I is derived from purple, and PS 2 is derived from chloroflexus.

Do you have a link / more info?

These microorganisms convert light into energy using a purple compound: https://en.wikipedia.org/wiki/Haloarchaea

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