AUTHOR=Yan Ni , Lv Zhibin , Hong Wenjing , Xu Xue TITLE=Editorial: Feature Representation and Learning Methods With Applications in Protein Secondary Structure JOURNAL=Frontiers in Bioengineering and Biotechnology VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/bioengineering-and-biotechnology/articles/10.3389/fbioe.2021.748722 DOI=10.3389/fbioe.2021.748722 ISSN=2296-4185