Figure 4. Comparative uptake of L-arginine and N-acetyl-L-cysteine in rabbit lenses (n=2) incubated with 5 mM L-arginine and 5 mM NAC with and without presence of 25 mM D-glucose or 5 mM ascorbic acid and 0.1 mM dehydroascorbic acid for 4 h. The lenses were washed with cold PBS and homogenized in water for L-arginine and NAC determination in supernatant by LC/MS.