Catalase is an antioxidant enzyme the activity of which is crucial for the protection against damage caused by reactive oxygen species. The -262C>T polymorphism in the promoter region of catalase gene was found to be associated with altered catalase levels. In this study, peripheral blood mononuclear cells catalase activity was measured after H(2)O(2)-induced oxidative stress. C/T and T/T genot...

Several rat and mouse hepatomas and the liver and kidneys of the host animals were assayed for catalase activity. Little or no activity could be demonstrated in the subcutaneously transplanted Novikoff hepatoma, Hepatoma LC18, and Hepatoma 3683 of rats, and in a number of transplanted hepatomas of mice and hamsters. A relatively high activity was found, however, in the transplanted Hepatoma 512...

to investigate the effect of droughtstress on chlorophyll content, enzymatic responses and some growth characteristics of acacia victoriae seedlings and the effect of super-absorbent polymers (sap) in reducing drought stress, a split plot experiment based on the completely randomized design was conducted. the treatments included four levels of drought stress (15, 30, 60 and 100% of field capaci...

The specific catalase activity of human diploid cell strains increases with progressive growth of the culture, and falls again following subculture. Although the increase is small, it is readily demonstrable, and is exponential with time. The response of catalase activity to progressive growth of the culture was studied in three abnormal human cell lines. A diploid cell strain, developed from a...

Catalase-peroxidase (KatG) is an enzyme capable of utilizing both catalase and peroxidase activity to break down hydrogen peroxide. Catalase activity by the enzyme generally dominates, but peroxidatic electron donors have been shown to stimulate catalase activity, likely by rescuing catalase-inactive intermediates resulting from off-pathway electron transfer. To investigate tryptophan 438 as a ...