NDUFA9 and nervous system disorder: And 23 of 49 differential proteins (genes name: ATP5A1, ATP5B, ATP5F1, COX5B, COX6B, CYCS, LOC100524613, LOC100525869, LOC733678, NDUFA10, NDUFA12, NDUFA8, NDUFA9, NDUFB10, NDUFB4, NDUFC2, NDUFS1, NDUFS2, NDUFS3, NDUFS7, NDUFV1, SDHA, SDHB) are co-exsit in KEGGs of the three neurological diseases (Figure 5).