Figure 8. Tryptophan and nontryptophan fluorescence of αL-crystallin modified by ribose

Carnosine enhanced the loss of tryptophan fluorescence. Nontryptophan fluorescence was remarkably increased in the presence of ribose with a shift to longer wavelengths (approximately 410 nm) when carnosine was also present. A: 15 days tryptophan. B: 25 days tryptophan. C: 15 days nontryptophan. D: 25 days nontryptophan.