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. 2017 Jul 17;372(1728):20160406. doi: 10.1098/rstb.2016.0406

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© 2017 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 1. — Speculative model on changes in carbon flux during P limitation in a diatom cell. (a) P-replete condition, based on a flux balance analysis in P. tricornutum [52]. (b) P-limiting condition. P. tricornutum is used as a template. Arrow thickness is correlated with relative carbon flux. Red arrows indicate the main carbon flow. Box, linear pathway; circle, cycle; dashed line, transportation between different compartments. Compartments: yellow dashed compartment, separate compartment for chrysolaminarin; blue, mitochondrion; purple, peroxisome; green, chloroplast. The question mark indicates an unknown pathway. Abbreviations: 2-PG, 2-phosphoglycerate; acyl-CoA, acyl-coenzyme A; acetyl-CoA, acetyl-coenzyme A; CIT, citrate; DAG, diacylglycerol; DGDG, digalactosyldiacylglycerol; DGCC, diacylglycerylcarboxyhydroxymethylcholine; DGTA, diaclyglycerylhydroxymethyltrimethylalanine; DGTS, diacylglyceroltrimethylhomoserine; DHAP, dihydroxyacetone phosphate; ECPS, extracellular polysaccharides; F6P, fructose-6-phosphate; G3P, glyceraldehyde-3-phosphate; G6P, glucose-6-phosphate; glycerol-3P, glycerol-3-phosphate; MAL, malate; MGDG, monogalactosyldiacylglycerol; OAA, oxaloacetate; PA, phosphatidic acid; PC, phosphatidylcholine; PE, phosphatidylethanolamine; PEP, phosphoenolpyruvate; PG, phosphatidylglycerol; PI, phosphatidylinositol; PUFA, polyunsaturated fatty acids; PYR, pyruvate; R5P, ribose-5-phosphate; SUC, succinate; SQDG, sulfoquinovosyl diacylglycerol; TAG, triacylglycerol; UDP, uridine diphosphate glucose; UDP-Gal, UDP-galactose; UDP-Glc, UDP-glucose; UDP-SQ, UDP-sulfoquinovose.