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The presence of lipids with an odd number of carbons with unsaturation are evidence that serum-derived unsaturated fatty acids are incorporated into the DGDG (A), PG (B), LysylPG (C), and CL (D) lipid classes of S. aureus. The symbols in parentheses indicate that the data are from positive (+) and negative (-) mode ESI. n = 4 per group. Statistics and detailed fatty acid composition from MS/MS experiments can be found in Data Set S1 in the supplemental material.
