in vitro , various treatments with 1 mm gsh , 1 mm glutamic acid ( glu ) , 1 mm glycine ( gly ) , 0.4 mm cys and/or 0.2 mm cystine ( cyscys ) inhibited dramatically the sharp decline in the intracellular ratio of gsh/gssg caused by 0.1 microm tpa .
C0017817
gsh
C0061516
gssg