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Spermidine/putrescine import ATP-binding protein PotA Spermidine/putrescine transport system permease protein potB Spermidine/putrescine transport system permease protein potC Spermidine/putrescine- binding periplasmic protein Gamma- glutamylputrescine synthetase Gamma- glutamylputrescine oxidoreductase Gamma- glutamyl- gamma- aminobutyrate hydrolase Gamma- glutamyl- gamma- aminobutyraldehyde dehydrogenase Putrescine Putrescine L-Glutamic acid ATP γ-glutamyl-L- putrescine ADP H + P i O 2 H + γ-Glutamyl-γ- butyraldehyde H 2 O 2 Ammonium γ-glutamyl-γ- aminobutyrate H 2 O γ-Aminobutyric acid L-Glutamic acid NADP H 2 O NADPH H + ATP H 2 O ADP P i H +
potA potB potC potD puuA puuB puuD puuC Putrescine Putrescine L-Glutamic acid Adenosine triphosphate γ-glutamyl-L- putrescine Adenosine diphosphate Hydrogen Ion Phosphate Oxygen Hydrogen Ion γ-Glutamyl-γ- butyraldehyde Hydrogen peroxide Ammonium γ-glutamyl-γ- aminobutyrate Water γ-Aminobutyric acid L-Glutamic acid NADP Water NADPH Hydrogen Ion Adenosine triphosphate Water Adenosine diphosphate Phosphate Hydrogen Ion