AUTHOR=Mulder Monique P. C. , Kessler Benedikt M. TITLE=In Memoriam: Professor Huib Ovaa (1973-2020): A Uniquely Brilliant and Enthusiastic Scientist, a Pioneer in Chemical Biology and the Ubiquitin Field JOURNAL=Frontiers in Chemistry VOLUME=8 YEAR=2020 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.00627 DOI=10.3389/fchem.2020.00627 ISSN=2296-2646