Abstract
The amino acid tryptophan is degraded upon light exposure or during acid and oxidative treatments. After irradiation of tryptophan solutions, the photodegradation products N′‐formylkynurenine, kynurenine, tryptamine, and oxindolylalanine were identified by means of HPLC. These photoproducts of tryptophan contribute to the photoyellowing of wool. Oxygen plays a major role in tryptophan photodegradation. An attack of oxygen at the indole residue initiates the photodegradation reaction. The main photodegradation of tryptophan in proteins (e. g. in polytryptophan or in wool) is the cleavage of the indole ring and the formation of kynurenines. In irradiated wool, only N′‐formylkynurenine was detected. N′‐Formylkynurenine is known to be a photosensitiser.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
