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  2. List of sports - Wikipedia

    en.wikipedia.org/wiki/List_of_sports

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  3. Ferredoxin hydrogenase - Wikipedia

    en.wikipedia.org/wiki/Ferredoxin_hydrogenase

    Ferredoxin hydrogenase belongs to the family of oxidoreductases, specifically those acting on hydrogen as donor with an iron-sulfur protein as acceptor. Ferredoxin hydrogenase has an active metallocluster site referred to as an "H-cluster" or "H domain" that is involved in the inter-conversion of protons and electrons with hydrogen gas.