ABSTRACT

Protein 1 ............................................................................................ 118 9.4 Aftermath ..................................................................................................... 119

9.4.1 PrPc Interaction with STI1 Triggers Neuroprotection ...................... 119 9.4.2 PrPc Interaction with Laminin and Vitronectin and

Validation of Complementary Hydropathy Theory .......................... 121 9.5 Conclusions ................................................................................................... 125 Acknowledgments .................................................................................................. 125 References .............................................................................................................. 125

Protein-protein interactions are major pillars of life on this planet. Although much has been devoted to their study in the last century, we still have many unanswered questions. How did protein-protein interactions arise? What are the evolutionary mechanisms responsible for the emergence of protein interacting pairs? How did the protein interaction network that sustains most of life’s physiological aspects come to exist?