AUTHOR= Frontiers Editorial Office TITLE=Expression of Concern: Purification, characterization, and hydrolysate analysis of dextranase from Arthrobacter oxydans G6-4B JOURNAL=Frontiers in Bioengineering and Biotechnology VOLUME=12 YEAR=2024 URL=https://www.frontiersin.org/journals/bioengineering-and-biotechnology/articles/10.3389/fbioe.2024.1450316 DOI=10.3389/fbioe.2024.1450316 ISSN=2296-4185