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The present study aims to characterize the polar lipid profile of cultured microalga Emiliania huxleyi using hydrophilic interaction liquid chromatography coupled with high-resolution mass spectrometry (HILIC\u2013MS) and fatty acids (FA) analysis by gas chromatography (GC\u2013MS). The lipidome of E. huxleyi revealed the presence of distinct n-3 PUFA (40% of total FA), namely docosahexaenoic acid (22:6n-3) and stearidonic acid (18:4n-3), which give this microalga an increased commercial value as a source of n-3 PUFA present in the form of polar lipids. A total of 134 species of polar lipids were identified and some of these species, particularly glycolipids, have already been reported for their bioactive properties. Among betaine lipids, the diacylglyceryl carboxyhydroxymethylcholine (DGCC) class is the least reported in microalgae. For the first time, monomethylphosphatidylethanolamine (MMPE) has been found in the lipidome of E. huxleyi. Overall, this study highlights the potential of E. huxleyi as a sustainable source of high-value polar lipids that can be exploited for different applications, namely human and animal nutrition, cosmetics, and pharmaceuticals.<\/jats:p>","DOI":"10.3390\/biom10101434","type":"journal-article","created":{"date-parts":[[2020,10,15]],"date-time":"2020-10-15T21:42:21Z","timestamp":1602798141000},"page":"1434","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["The Polar Lipidome of Cultured Emiliania huxleyi: A Source of Bioactive Lipids with Relevance for Biotechnological Applications"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6651-3226","authenticated-orcid":false,"given":"Susana S.","family":"Aveiro","sequence":"first","affiliation":[{"name":"Mass Spectrometry Center, LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"given":"T\u00e2nia","family":"Melo","sequence":"additional","affiliation":[{"name":"ECOMARE, CESAM\u2014Centre for Environmental and Marine Studies, Department of Chemistry, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"given":"Ana","family":"Figueiredo","sequence":"additional","affiliation":[{"name":"Mass Spectrometry Center, LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8060-7675","authenticated-orcid":false,"given":"Pedro","family":"Domingues","sequence":"additional","affiliation":[{"name":"Mass Spectrometry Center, LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"given":"Hugo","family":"Pereira","sequence":"additional","affiliation":[{"name":"Green Colab\u2014Associa\u00e7\u00e3o Oceano Verde, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7509-2216","authenticated-orcid":false,"given":"In\u00eas B.","family":"Maia","sequence":"additional","affiliation":[{"name":"Centre of Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"given":"Joana","family":"Silva","sequence":"additional","affiliation":[{"name":"Allmicroalgae Natural Products S.A., Apartado 9, 2449-909 Pataias, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5357-3601","authenticated-orcid":false,"given":"M. Ros\u00e1rio","family":"Domingues","sequence":"additional","affiliation":[{"name":"Mass Spectrometry Center, LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"},{"name":"ECOMARE, CESAM\u2014Centre for Environmental and Marine Studies, Department of Chemistry, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7217-2790","authenticated-orcid":false,"given":"Cl\u00e1udia","family":"Nunes","sequence":"additional","affiliation":[{"name":"CICECO\u2014Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"given":"Ana S. P.","family":"Moreira","sequence":"additional","affiliation":[{"name":"Mass Spectrometry Center, LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"},{"name":"CICECO\u2014Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2020,10,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1263\/jbb.101.87","article-title":"Commercial applications of microalgae","volume":"101","author":"Spolaore","year":"2006","journal-title":"J. Biosci. 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