Toxic Effects of Metal Oxide Nanoparticles Based on the Enzymatic Activity and Biosynthesis of -Galactosidase Using a Mutant Strain of .

The effects of six metal oxide nanoparticles (MO-NPs) on the activity and biosynthesis of an enzyme (-galactosidase) were examined using a mutant strain of . Different sensitivities were observed according to the type of NP and metabolic process. The toxic effects on enzyme activity were significantly greater than on biosynthesis (p < 0.