17 to 30 %
||Weinbauer MG. Ecology of prokaryotic viruses. FEMS Microbiol Rev. 2004 May28(2):127-81. p.166 left column 3rd paragraphPubMed ID15109783
||Jiang SC, Paul JH. Viral contribution to dissolved DNA in the marine environment as determined by differential centrifugation and kingdom probing. Appl Environ Microbiol. 1995 Jan61(1):317-25.PubMed ID16534913
systems, Jiang and Paul [primary source] estimated that ca. 50% of
the dissolved DNA is bound and 17–30% can be accounted
for by viruses."