Fig. 4

Quantification of E83 arginylation as a fraction of the total α-syn levels in the human frontal cortex. a Representative Western blot images (left) and calibration curves (right), of standard unmodified and E83-arginylated α-syn. b Quantification of the fraction of E83-arginylated α-syn as the percentage of the upper band (U, marked with arrows in both gels) and of the total α-syn in the preparation (the sum of upper and lower bands marked with arrow and asterisk, respectively), calculated by running the calibrations. Percentage of arginylated α-syn to the upper band (U) and the total are shown both as a table (left) and as a chart (right)