The discovery of β-galactosidase

R.J. Rouwenhorst, Jack Pronk, J.P. van Dijken

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)


The enzyme β-galactosidase was first mentioned in the literature by Beijerinck exactly a hundred years ago. The Department of Microbiology and Enzymology of the Delft University of Technology keeps the memory of Beijerinck, its first professor, alive by maintaining a ‘Beijerinck-room’ in the attic of the building. In addition to manuscripts and laboratory notebooks, this room contains some of his chemicals and biological preparations, and it was here that we recently found a 90-year old lactase preparation. Even after storage under suboptimal conditions, the preparation still exhibited measurable enzyme activities.
Original languageEnglish
Pages (from-to)416-418
JournalTrends in Biochemical Sciences
Issue number10
Publication statusPublished - 1989


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