Koç, Cengiz
Xia, Guoqing
Kühner, Petra
Spinelli, Silvia
Roussel, Alain
Cambillau, Christian
Stehle, Thilo
Article History
Received: 9 December 2015
Accepted: 17 May 2016
First Online: 10 June 2016
Competing interests
: The authors declare no competing financial interests.