. "The enzyme from some sources contains selenocysteine." . "The enzyme also reduces the riboflavin analog of F420, flavins and methylviologen, but to a lesser extent." . "The hydrogen acceptor coenzyme F420 is a deazaflavin derivative." . . . "Coenzyme F420 hydrogenase" . "8-hydroxy-5-deazaflavin-reducing hydrogenase" . "F420-reducing hydrogenase" . "Coenzyme F420-dependent hydrogenase" . . "H(2) + coenzyme F420 = reduced coenzyme F420." . "FAD" . "Iron" . "Nickel" .