of;
Sofia,;
Faculty;
of;
Biology,;
Institute;
of;
Molecular;
Biology,;
Sofia,;
Bulgaria;
of;
Halle-Wittenberg,;
institute;
of;
Pharmacy,;
Department;
of;
Pharmaceutical;
Biology;
and;
Pharmacology,;
Laboratory;
of;
Molecular;
Cell;
Biology,;
Kurt;
Mothes;
Str.;
3,;
06120;
Halle;
(Saale),;
Germany;
Group;
'Enzymatics;
of;
Protein;
Folding',;
Laboratory;
of;
Mass;
Spectrometry,;
Halle;
(Saale),;
Germany;