ATP5O was reported as one member of eight mitochondrial genes including NDUFS5, VDAC3, ATP5O, IMMT, MRPL28, COX5B, MRPL52, and PRKDC, which generated a compact gastric mitochondrial gene signature for predicting tumor progression and overall survival of GC patients [39]. The gene discussed is NDUFS5; the disease is neoplasm.