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Stress modifies gut microbiota catalase gene abundance and enzyme activity. (a) Relative abundance of catalase gene content observed across bacterial taxa in colonic contents of Con and Str mice (n = 3/group). (b) Colonic luminal content catalase activity (nmol/min/mL) is upregulated in Str vs. Con mice (n = 5/group). * = p < .05, ** = p < .01.
