{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["5(40)"],"submitter":["Fracassetti D"],"pubmed_abstract":["Riboflavin (RF) is a well-known photosensitizer, responsible for the light-induced oxidation of methionine (Met) leading to the spoilage of wine. An NMR approach was used to investigate the role of gallic acid (GA) and sulfur dioxide (SO<sub>2</sub>) in the RF-mediated photo-oxidation of Met. Water solutions of RF and Met, with and without GA or SO<sub>2</sub>, were exposed to visible light for increasing time in both air and nitrogen atmospheres. Upon light exposure, a new signal appeared at 2.64 ppm that was assigned to the S(O)CH<sub>3</sub> moiety of methionine sulfoxide. Its formation rate was lower in a nitrogen atmosphere and even lower in the presence of GA, supporting the ability of this compound in quenching the singlet oxygen. In contrast, SO<sub>2</sub> caused relevant oxidatio"],"journal":["ACS omega"],"pagination":["26220-26229"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC7558052"],"repository":["biostudies-literature"],"pubmed_title":["Investigating the Role of Antioxidant Compounds in Riboflavin-Mediated Photo-Oxidation of Methionine: A <sup>1</sup>H-NMR Approach."],"pmcid":["PMC7558052"],"pubmed_authors":["Mastro M","Limbo S","Tirelli A","Ragg EM","Fracassetti D","Pellegrino L"],"additional_accession":[]},"is_claimable":false,"name":"Investigating the Role of Antioxidant Compounds in Riboflavin-Mediated Photo-Oxidation of Methionine: A <sup>1</sup>H-NMR Approach.","description":"Riboflavin (RF) is a well-known photosensitizer, responsible for the light-induced oxidation of methionine (Met) leading to the spoilage of wine. An NMR approach was used to investigate the role of gallic acid (GA) and sulfur dioxide (SO<sub>2</sub>) in the RF-mediated photo-oxidation of Met. Water solutions of RF and Met, with and without GA or SO<sub>2</sub>, were exposed to visible light for increasing time in both air and nitrogen atmospheres. Upon light exposure, a new signal appeared at 2.64 ppm that was assigned to the S(O)CH<sub>3</sub> moiety of methionine sulfoxide. Its formation rate was lower in a nitrogen atmosphere and even lower in the presence of GA, supporting the ability of this compound in quenching the singlet oxygen. In contrast, SO<sub>2</sub> caused relevant oxidatio","dates":{"release":"2020-01-01T00:00:00Z","publication":"2020 Oct","modification":"2025-05-29T19:05:56.008Z","creation":"2025-05-29T19:05:56.008Z"},"accession":"S-EPMC7558052","cross_references":{"pubmed":["33073148"],"doi":["10.1021/acsomega.0c03845"]}}