Lpaatδ deficiency does not reduce the relative content of docosahexaenoic acid in whole-brain phospholipids. Shown is the fatty acyl species composition of PA (A), PS (B), PG (C), and CL (D) from whole brains of wild-type or Lpaatδ−/− mice as a relative percentage of total fatty acid (FA) mass. The data are means ± SEM (n = 4). *, P < 0.05; ***, P < 0.001 versus the wild type.