The decrease in the concentration of the photoexcited triplet state of tryptophan in lens protein with irradiation time is contrasted with the buildup of the concentration of free radical(s) via electron spin resonance (ESR). The results obtained from several species indicate that the rates of the decay of the. ΔMS = ± 2 triplet state signal of tryptophan and the buildup of the free radical signal are nearly identical. This suggests a significant role played by tryptophan in the production of chemically active free radicals which may, in turn, initiate various types of cross-linking between peptides. A second photoexcited triplet state species, which appears to be a N-formylkynurenine derivative, has been found in irradiated rhesus monkey lenses

Keywords:
Cataract, Triplet state, Free radical, Lens protein, Tryptophan, N-formyl-kynurenine, Ultraviolet radiation
This content is only available via PDF.
© 1978 S. Karger AG, Basel
1978
Copyright / Drug Dosage / Disclaimer
Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.
You do not currently have access to this content.