Add to ORKGWhile writing up my thesis, it became very clear to me, that I could not have done my PhD without the help of so many. Meeting many people who helped and invested their time and knowledge in me has marked my time as PhD student. For me these are the most valuable experiences. First of all I want to thank Prof. Dr. Theo Wallimann. He agreed immediately when I asked him in December 1999 whether I could carry out my PhD in his lab. He was always present and gave good advice and help in both scientific and more “normal life ” questions. He always gave me the freedom to develop own ideas. He never gave up his patience, even during times filled with conflicts. Thanks a lot for all the valuable discussions about scientific careers, the future and ...