New aspects of ochratoxin A and citrinin biosynthesis in Penicillium

- The actual knowledge of the ochratoxin genes in Penicillia is described.
- The organization of the citrinin biosynthesis gene cluster in the Penicillia is described.
- Ecological reasons for the biosynthesis of the treated toxins are suggested.
- An overview about the relation of toxin biosynthesis and habitat is given.