Figure 4

Composition of pPE, pPC, and SM in ECpa, HUVEC and HFL-1 cells determined by LC-MS/MS. Levels of pPE, pPC, and SM in ECpa were compared with HUVEC (a–c) and HFL-1 (d–f). PE (34:0), PC (30:0), and SM (35:0) were used as internal standards, with 1 μg being added to 100 μg of protein solution. (*p < 0.05).