1.1.1.193 D33A the mutant shows 0.1-0.6% activity compared to the wild type enzyme 760492 1.1.1.193 D33K inactive 760492 1.1.1.193 D33N inactive 760492 1.1.1.193 D57N the mutant shows 0.1-0.6% activity compared to the wild type enzyme 760492 1.1.1.193 E156Q inactive 760492 1.1.1.193 K151A inactive 760492 1.1.1.193 K151D inactive 760492 1.1.1.193 K151E inactive 760492 1.1.1.193 additional information a ribG mutant can be rescued by expression of ribB, overview -, 684754 1.1.1.193 N9A the mutant shows 0.1-0.6% activity compared to the wild type enzyme 760492