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Photosynthesis serves as the primary mechanism for converting solar energy into chemical energy and plays a pivotal role in regulating atmospheric oxygen levels and carbon dioxide concentrations, influencing global climate patterns as a result.

Long before the existence of microbes was known, humans were unknowingly harnessing their power through practices such as brewing, bread leavening, or cheesemaking. These processes extended the shelf life of food, enhanced its nutritional value, and significantly contributed to the advancement of industry and civilization.

Here we explore purple non-sulfur bacteria (PNSB) and some of its biotech applications, with a focus on how these applications have been enhanced by manipulating the flow of reducing power.