AUTHOR=Bell Jessica L. , Malyukova Alena , Bertoldo Jean B. , Summers Matthew K. , Sun Yi TITLE=Editorial: Ubiquitin-Modifying Enzymes as Drug Targets and Biomarkers in Cancer JOURNAL=Frontiers in Oncology VOLUME=11 YEAR=2021 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2021.758983 DOI=10.3389/fonc.2021.758983 ISSN=2234-943X