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. 2016 Jun 21;16:141. doi: 10.1186/s12870-016-0831-3

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© The Author(s). 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Potential mechanisms of concerted regulation of downstream genes by PHYB and PHYC. a Heterodimer regulation: regulation by a PHYB/PHYC heterodimer results always in changes in the same direction in phyB-null and phyC-null mutants. b-c Homodimer regulation: independent regulation by PHYB/PHYB and PHYC/PHYC homodimers can result in changes in the same or opposite direction. b Gene “G” is differentially regulated in the same direction in both phyB-null and phyC-null mutants. c Gene “J’ is upregulated in the phyB-null and downregulated in phyC-null mutant