Differences in lipid profiling between prom1-exo (MV) and parental FEMX-I cells (FEMX). An automated ESI-tandem mass spectrometry approach was used for lipid profiling. Averages of three to five determinations for each sample group were calculated. Red, lipid species over-expressed in prom1-exo; blue, lipid species over-expressed in parental FEMX-I cells. *, p < 0.05; **, p < 0.01; ***, p < 0.001 (unpaired Student’s t test); head groups: PS, phosphatidylserine; PE, phosphatidylethanolamine; PC, phosphatidylcholine; PI, phosphatidylinositol; the first number indicates the length of the hydrocarbon chain and the second number indicates the number of double bonds.