Effect of 2-AG and Fabp1 gene ablation on hepatocyte levels of AEA and non-ARA-containing NAEs. Hepatocytes were isolated from WT or LKO mice, plated on culture dishes, and incubated with 2-AG (1 μM) for 1 h. Lipids were then extracted and analyzed by LC-MS to determine AEA and NAE levels, as described in the Materials and Methods. AEA (A), OEA (B), PEA (C), DHEA (D), and EPEA (E). Values represent the mean ± SEM, n = 4–6. #P < 0.05 versus WT in the same treatment groups; *P < 0.05 versus untreated of the same genotype.