Agrobacterium tumefaciens
As a postdoc, she did research at the Universities of Yale and Stanford, and in 1971 at the Biozentrum, University of Basel. In 1978, she became a group leader at the Friedrich Miescher Institute. From 1989, Hohn was Associate Professor of Molecular Genetics and in 1996 Adjunct Professor at the University of Basel. She retired in 2004. Her research topics included the "Agrobacterium tumefaciens".