Glutathione system enhancement for cardiac protection: pharmacological options against oxidative stress and ferroptosis Cell Death & Disease Gamma Glutamyl Transpeptidases: Structure and Function Springer Nature Link Gamma Glutamylcysteine an overview ScienceDirect Topics Crystal structures of glutamyltranspeptidase from Escherichia coli, a key enzyme in glutathione metabolism, and its reaction intermediate PNAS The Emerging Roles of Glutamyl Peptides Produced by Glutamyltransferase and the Glutathione Synthesis System Glutathione You Are The Healer