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. 2014 Aug 1;9(8):e103125. doi: 10.1371/journal.pone.0103125

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© 2014 Morita et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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The DNase activities of oral streptococcus strains were examined using BHI agar plates containing salmon sperm DNA. The plates were incubated for 72-digested DNA. Halos seen around colonies reflect DNA digestion. The following strains were tested: S. sanguinis, SK36; S. oralis, NCTC 11427T/SK23; S. mutans, MT8148; S. salivarius, HHT; S. parasanguinis, ATCC 903; S. sobrinus, MT10186. Bar, 1 cm.