Figure 3. Electrospray ionization (ESI)
mass spectra of samples of A2E irradiated in the absence and presence
of glutathione (GSH). Mixtures of A2E and GSH at indicated
concentrations were irradiated at 430 nm for 20 min following which the
sample was analyzed by ultraperformance liquid chromatography–mass
spectrometry (UPLC/MS). The mass to charge ratio (m/z) of
glutathione disulfide (GSSG) is 613.