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. 2017 Oct 16;7:13214. doi: 10.1038/s41598-017-13575-x

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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CN-PAGE of Chromera (C.v.) membrane complexes solubilised by α-DM, β-DM or β-DM with 0.4% SDS. For each line 15 μg of chlorophyll was loaded and the gel scanned under white light illumination (WL). Chlorophyll fluorescence emitted by PSII and by ‘free’ antenna proteins (FL) was detected by Fuji LAS 4000 after excitation by blue light. SC marks a PSI-PSII supercomplex observed only in the α-DM solubilised membranes (see Fig. 3); PSI marks a monomeric PSI supercomplex with (fucoxanthin-chlorophyll) light-harvesting antennae. Membranes (3 μg of chlorophyll) isolated from the cyanobacterium Synechocystis 6803 and solubilised with β-DM (Syn mem) were used to demonstrate the mobility of photosynthetic complexes: PSI[1] (~350 kDa) and PSI[3] (~1 MDa), monomer and trimer of PSI, respectively; PSII[2] (~700 kDa), dimer of PSII; CpcA/B[6], ~100-kDa heterohexamer of CpcA and CpcB phycobiliproteins.