Assigned Cluster Color Pink Blue Red Green Assigned Symbol X + Δ O P53 (p) 1 1 3 3 PTP (pt) 0 3 4 1 SRC (s) 3 2 0 3 CDK2 (c) 0 3 1 4 A 1 3 2 2 B 2 3 2 1 C 2 4 2 0 D 0 2 4 2 E 1 1 2 4 F 2 5 0 1 Total Number of Samples 12 26 20 22

Table 3: Number of protein samples assigned to clusters. Cluster analysis is based on a specimen of 80 protein samples. Specimen is composed of 4 proteins, as showed in previous results. Protein called A, B, C, D, E and F have an unknown distribution on the MS/SNAP sample during acquisition. This results are based on SPADS/k means output showed in Figure 8.