Figure 5
From: Bioaccumulation and toxicity of selenium compounds in the green alga Scenedesmus quadricauda
Activity of thioredoxine reductase in asynchronous cultures of Scenedesmus quadricauda. Activity of thioredoxine reductase in asynchronous cultures of the wild type and selenium resistant strains of Scenedesmus quadricauda grown at the concentrations of selenite or selenate (0 and 50 mg Se × l-1): WT: wild type; SeIV: selenite resistant strain; SeVI: selenate resistant strain; SeIV+VI: selenite/selenate resistant strain. Samples were collected after 12 hours of cultivation. A specific activity of the TR was expressed as units per mg of cell proteins, where a unit is defined as the amount of enzyme that will cause an absorbance change of 1 at 412 nm using 200 μM NADPH per min. Data are presented as means ± S.D. of triplicate experiments.