Extended Data Fig. 5 |. Proteinase K digestion profiles of α-syn aggregates derived from samples of CSF from all 43 patients with PD and 43 patients with MSA.

This is the same experiment as Fig. 2d, showing proteinase K digestion profiles of all 86 (n = 43, PD; n = 43, MSA) biologically independent samples analysed. Aliquots of the product of the second round of the α-syn-PMCA assay were treated with proteinase K (1 mg ml⁻¹) at 37 °C for 1 h. Proteins were separated on a 12% Bis-Tris gel and immunoblotted with the BD anti-α-syn clone 42 antibody. Molecular weight markers (kDa) are indicated on the left of the blot. The third blot on the top row is the same as that shown in Fig. 2d.