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. 2018 Nov 13;9:2696. doi: 10.3389/fmicb.2018.02696

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Copyright © 2018 Bradford, Vestergaard, Táncsics, Zhu, Schloter and Lueders.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Quantitative distribution of rRNA in SIP gradients, as measured by RT-qPCR of bacterial SSU rRNA across buoyant density fractions. RNA fractions pooled from duplicate gradients for direct sequencing are given with respective symbols.