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. 2014 Aug 6;5:404. doi: 10.3389/fmicb.2014.00404

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Copyright © 2014 Cua and Stein.

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) or licensor 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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Growth (OD₆₀₀) measured over time (h) for S. wittichii RW1 WT cultures initiated at atmospheric O₂ (black symbols) or reduced O₂ (gray symbols), and for norB_ch mutant S. wittichii RW1 cultures initiated at atmospheric O₂ (white symbols). Triangles = 0 mM added NaNO₂, squares = 0.3 mM added NaNO₂, and circles = 1 mM added NaNO₂. Points on the growth curves represent averaged values from 5 independent experiments for each incubation condition.