Our data show that p-eEF2 (T56) immunostaining is increased in SN and periaqueductal gray (PAG) matter (gray matter surrounding cerebral aqueduct) in PD midbrain sections compared to controls (Fig. 1a-b; additional controls shown in Additional file 1: Figure S2a; additional PD cases are shown in Additional file 1: Figure S3a; quantitation of p-eEF2 IHC staining is presented in Fig. 3a). The gene discussed is EEF2; the disease is Parkinson disease.