MT-CO1 and Alpers syndrome: In the occipital cortex, there was a significant main effect across groups (Kruskal–Wallis, P < 0.0001), with post hoc analyses revealing significantly reduced levels of NDUFB8 and COXI in all patients with Alpers' syndrome and the SUDEP patient group relative to controls (P < 0.0001), albeit most SUDEP patient z‐scores were within the normal range (Figure 3B,C) indicating intact NDUFB8 and COXI protein levels.