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Schematic representation of photocatalytic H2 generation with EY and an O2-tolerant Db [NiFeSe] hydrogenase (EY–hydrogenase) system in the presence of TEOA in pH-neutral aqueous solution. Photo-induced electron transfer occurs directly from the EY to the [Fe4S4] cluster relay[3a, 6c, 8g] and then to the H2-evolving [NiFeSe]-active site of the enzyme (see text).
