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  • Title: Genetic engineering of cyanobacteria to enhance biohydrogen production from sunlight and water.
    Author: Masukawa H, Kitashima M, Inoue K, Sakurai H, Hausinger RP.
    Journal: Ambio; 2012; 41 Suppl 2(Suppl 2):169-73. PubMed ID: 22434447.
    Abstract:
    To mitigate global warming caused by burning fossil fuels, a renewable energy source available in large quantity is urgently required. We are proposing large-scale photobiological H(2) production by mariculture-raised cyanobacteria where the microbes capture part of the huge amount of solar energy received on earth's surface and use water as the source of electrons to reduce protons. The H(2) production system is based on photosynthetic and nitrogenase activities of cyanobacteria, using uptake hydrogenase mutants that can accumulate H(2) for extended periods even in the presence of evolved O(2). This review summarizes our efforts to improve the rate of photobiological H(2) production through genetic engineering. The challenges yet to be overcome to further increase the conversion efficiency of solar energy to H(2) also are discussed.
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