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The evolution of phototrophic bacteria and photosynthesis in general is certainly an interesting but complex topic. It is commonly well accepted that anoxygenic phototrophy evolved well before the gradual oxygenation of the Earth. This means that the photosynthetic machinery of anaerobic phototrophic bacteria (like purple and green bacteria) evolved well before the existence of oxygenic photosynthesis of algae and plants. One of the best studied model organisms for studying photosynthesis in purple… Read More

It is not every day that an entire bacterial genus is discovered and reclassified. We are lucky when occasionally we find a new species, but that alone certainly does not redefine an entire genus. It took the sequencing and comparative analysis of eight new genomes, in addition to the three known genomes of heliobacteria, to come to this discovery. The family of heliobacteria are a small group of phototropic bacteria that were… Read More