Quenching of singlet molecular oxygen by carnosine and related antioxidants. Monitoring 1270-nm phosphorescence in aqueous media
Laboratory studyOther animals
- Design
- Laboratory study
- What was measured
- Singlet oxygen quenching rates in D2O at pD 7 by 1270 nm phosphorescence for carnosine, its components and related compounds.
What the authors reported
Carnosine, anserine and ergothioneine quenched singlet oxygen at similar rates (about 3 x 10^7 per M per s), close to L-histidine and imidazole, while taurine and beta-alanine were far less active. The rate constants did not correlate with literature data on the compounds' effects on muscle working capacity or myeloperoxidase inhibition. The authors suggested the dipeptides' natural biochemical functions are most probably determined by different processes, though they can protect against singlet oxygen in water.
Limits of this study
Cell-free chemistry. Full text not read.
Source
PubMed 9111930 · doi:10.1080/15216549700201731
Entry checked against PubMed abstract (E-utilities) on 2026-10-19. The dose shown is the dose the researchers used. It is not a recommendation. How to read this page.