Abstract
Summary
1. Urinary dialysates were found to retain inhibitory activity toward DNase II after ashing. 2. Chemical analysis of the charcoal-treated dialysate before and after ashing indicated presence of detectable quantities of sulfate ions but not of Mg++ and Cu++. 3. Various divalent ions, in contrast to monovalent ions, had a marked inhibitory effect on DNase II. 4. The data suggest that a major portion of urinary inhibitory activity with respect to DNas e is due to presence of sulfate ions in the concentrated urinary dial vsate.
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