title: Letter: "Gamma-glutamyl cycle".
mesh_terms: D000596:Amino Acids / Q000378:metabolism*; D001692:Biological Transport; D007668:Kidney / Q000378:metabolism; D005723:gamma-Glutamyltransferase / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D005723:gamma-Glutamyltransferase