KCNK3 and sudden infant death syndrome: TASK-1 and TASK-3 potassium channel play an important role in oxygen-sensing of the CB.19 Moreover, the ability of the CB to measure oxygen depends on mitochondrial complex I (NDUFS2).20 No potentially pathogenic variants were found in the TASK-1,43TASK-3, or NDUFS2 genes in our SIDS cohort.