AUTHOR=Franzini Maria, Pompella Alfonso, Corti Alessandro TITLE=Gamma-glutamyltransferases: exploring the complexity of a multi-functional family of enzymes JOURNAL=Frontiers in Pharmacology VOLUME=5 YEAR=2014 URL=https://www.frontiersin.org/articles/10.3389/fphar.2014.00221 DOI=10.3389/fphar.2014.00221 ISSN=1663-9812