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IT has been shown [Marks and Fox, 1933; Marks, 1934, 1] that catalases from certain marine animals, on standing in air, slowly lose their ability to decompose hydrogen peroxide. This inactivation was found to be caused primarily by oxygen and the reaction to be pseudo-unimolecular under the given experimental conditions. The question arose as to whether or not catalases from marine plants would likewise be inactivated.

The inactivation of catalases from certain marine plants by oxygen