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Factor loading plots of the principal component analyses of the percentages of lipid classes in Echium acanthocarpum E1.5 cell line hairy roots, growing in different media at 15°C (C1–C4 cultures). PC = phosphatidylcholine; PS + PI = phosphatidylserine and phosphatidylinositol; PG = phosphatidylglycerol; and PE = phosphatidylethanolamine.
