Acylcarnitine Analyses (A) Serum acylcarnitine analysis of MCAD+/+ (n = 4) and MCAD−/− mice (n = 4) There are significant elevations in acylcarnitine species as indicated in MCAD−/− mice. Values shown are mean values ± standard deviation (SD). Asterisk indicates p < 0.002 and ‡ indicates p < 0.01. (B) There are significant elevations in bile acylcarnitines of the same mice shown in (A) as indicated. Values shown are mean values ± SD. Asterisk indicates p < 0.001. (C) Bile acylcarnitine profile of an MCAD−/− mouse compared to a human patient with MCAD deficiency. Internal standards are indicated by an asterisk.