Fig. 2

Optimization of mass spectrometry parameters for pY39 peptide detection. a The relative intensity of the standard pY39 αβ-syn peptide with different HCD NCEs. b The relative intensity of the standard pY39 αβ-syn peptide with different ion transfer tube capillary temperatures. c The relative intensity of the standard pY39 αβ-syn peptide with different ESI voltages