Values given are mean ± SD. aMCAD+/+ n = 5 and MCAD−/− n = 5. bMCAD+/+ n = 8 litters and MCAD−/− n = 10 litters. cMCAD+/+ n = 5 and MCAD−/− n = 6. dMCAD+/+ n = 4 and MCAD−/− n = 5. eExpressed as a ratio relative to the internal standard.