Control Range Zellweger Spectrum Range Family 1 Family 5 II:3 II:2 VLCFA concentration (μmol/l) C22:0 3.84–10.2 2.36–5.59 4.43 3.67 C24:0 7.76–17.66 5.41–13.39 8.36 8.58 C26:0 0.18–0.38 0.59–3.38 0.24 0.22 VLCFA ratio C24:0/C22:0 1.55–2.3 2.08–3.4 1.89 2.34 C26:0/C22:0 0.03–0.07 0.11–1.17 0.05 0.06 DHAPAT activity [nmol/(2h × mg protein)] 5.4–10.6 0.1–0.9 7.1 14 ACOX1 immunoblot 72 kDa + + + + 52 kDa + − + + 20 kDa ++ − + + Thiolase immunoblot 44 kDa − + − − 41 kDa + − + + α oxidation activity [pmol/(h × mg protein)] phytanic acid substrate 28–95 0–10 34 39 β oxidation activity [pmol/(h × mg protein)] C16:0 substrate 3,330–7,790 3,330–7,790 7,162 5,959 C26:0 substrate 800–2,040 50–350 1,088 1,013 pristanic acid substrate 790–1,690 0–30 1,092 756