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. 2011 May 5;6(5):e19553. doi: 10.1371/journal.pone.0019553

Figure 4. Molar percentage of the five most abundant lipid classes among the identified tear fluid lipids.

Figure 4

The proportions are based on the UPLC-MS data. Cer, Ceramide; PC, phosphatidylcholine; PE, phosphatidylethanolamine; SM, sphingomyelin; TG, triglyceride.