Table 4. Spectral peaks selected in the analysis of technical replicates mass spectra.

A	m/z (Da)
	2554.40	2660.76	2755.04	3192.90	3242.07	3263.82	3954.33	4092.44	4211.37	5906.25
	6434.47	6632.72	7767.02
B	m/z (Da)
	2021.69	2082.35	2114.80	2192.65	2209.83	2378.88	2495.96	2554.40	2604.38	2641.45
	2660.76	2723.83	2755.04	2769.70	2863.08	2884.92	2933.20	2954.46	3159.17	3192.90
	3215.50	3242.07	3263.82	3449.01	3884.10	3954.33	4055.61	4092.44	4211.37	4269.32
	4283.17	4644.92	4965.40	5338.46	5906.25	6434.47	6632.72	7767.10	9133.84	9290.47

(A) Set of m/z reference peaks with a frequency greater than 90% used for spectra alignment.

(B) Set of m/z spectral features with a frequency greater than 50% used to build the feature matrix for statistical analysis.