Protein interaction network summarizing all regulated proteins belonging to the GO-term “platelet activation”. From all 299 regulated proteins, only members of the GO-term “platelet activation” were searched for interactions using STRING,²⁴  using a medium threshold confidence. Potential PKA sites are highlighted with arrows and the corresponding colors indicate the time points which are regulated compared with 0-second iloprost treatment (dashed lines for downregulation). Upregulated phosphorylation sites are labeled in red and downregulated in blue. Estimated protein copy numbers are taken from Burkhart et al.⁸