Cyanobacteria have been engineered to produce isobutanol directly. What advantage does this have over other alternative biofuels?

Producing isobutanol directly in cyanobacteria avoids having to harvest biomass and then process it through multiple conversion steps. That makes “Multiple processing steps can be avoided” the advantage. Renewable fuel, photosynthesis, and replacing gasoline can also apply to other biofuels, so they do not identify this specific advantage.

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