ATP5F1B and Parkinson disease: Interestingly, a high percentage of neurons were categorised as showing decreased expression of complex V in some PD cases (ATP5B: 4/9 cases, range 39.53–86.11%; OSCP: 3/9 cases, range 38.46–90.91%), though the disparity between expression of the two subunits in three PD cases (PD02, 03 and 07) requires further investigation.