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Keywords:

  • chirality;
  • D-amino acids;
  • enzyme catalysis;
  • inhibitors;
  • post-translational modifications
Thumbnail image of graphical abstract

The inside cover picture shows an oriental fire-bellied toad (Bombina orientalis). Their skin secretions contain numerous biologically active peptides, some of which are subject to a post-translational stereo-inversion of the amide backbone. The scheme of this enzymatic reaction is also depicted. For details on the underlying mechanism, see the paper by A. Jilek et al. on p. 1996 ff.