Candidates with the selection levels 3, 4, and 5 interact or are functionally similar to PD-related proteins, and in addition match candidates from the PINK1TAP screen, or are annotated to PD-related processes, overlap with the Parkin/PINK1 fly genetic screen or do not interact with many proteins (and therefore tend to make unique/specific interactions). Here, PINK1 is linked to Parkinson disease.