TABLE 2

Density of DNA for taxa exhibiting or not exhibiting tracer assimilation in the three tracer experiments

TracerMean DNA density (g cm−3) ± SD for taxa that:
Assimilated tracerDid not assimilate tracer
[18O]water1.6905 ± 0.00311.6912 ± 0.0033
[18O]water with glucose1.6896 ± 0.00331.6894 ± 0.0045
[13C]glucose1.6890 ± 0.00301.6900 ± 0.0036