Co-expression of auxiliary genes enhances the activity of a heterologous O2-tolerant hydrogenase in the cyanobacterium Synechocystis sp. PCC 6803. - Lupacchini, Sara; Stauder, Ron; Opel, Franz; Klähn, Stephan; Schmid, Andreas; Bühler, Bruno; Toepel, Jörg (Biotechnology for Biofuels & Bioproducts, 2025)