Figure 5. Extra-lenticular changes in cysteine, Cys-Gly and γ-Glu-Cys levels during lens culture. Bovine lenses were incubated in a final volume of 40 ml of GSH/Gly-Gly/SB medium supplemented with 0.5 mM of either cysteine (triangles), Cys-Gly (squares) or γ-Glu-Cys (circles) and at different times extra-lenticular thiol contents were evaluated (see Methods). Values are reported as the mean of at least three different experiments; the error bars represent the standard error of the mean.