title: Luminescence of Ca(2+)-activated photoprotein obelin initiated by NaOCl and MnCl2.
abstract: The luminescence of obelin is initiated by NaOCl in a reaction mixture containing no calcium. The addition of Mn2+ enhances the light emission > 300-fold. Sodium azide and histidine, as singlet oxygen quenchers, inhibit NaOCl-activated obelin luminescence in the presence or absence of Mn2+. This suggests that the addition of NaOCl to the mixture causes singlet oxygen formation (stimulated by Mn2+ ions), and singlet oxygen initiates the light-emitting reaction.
authors.affiliation: Laboratory of Photobiology, Russian Academy of Sciences, Krasnoyarsk.
authors.forename: E S
authors.initials: ES
authors.lastname: Vysotski
authors.forename: K P
authors.initials: KP
authors.lastname: Trofimov
authors.forename: V S
authors.initials: VS
authors.lastname: Bondar'
authors.forename: J I
authors.initials: JI
authors.lastname: Gitelson
mesh_terms: D002118:Calcium / Q000378:metabolism*; D002712:Chlorides / Q000494:pharmacology*; D007700:Kinetics; D008163:Luminescent Measurements; D008164:Luminescent Proteins / Q000737:chemistry* / Q000187:drug effects / Q000378:metabolism; D017895:Manganese Compounds / Q000494:pharmacology*; D012973:Sodium Hypochlorite / Q000494:pharmacology*
chemical_list: D002712:Chlorides; D008164:Luminescent Proteins; D017895:Manganese Compounds; C010497:obelin; D012973:Sodium Hypochlorite; C025340:manganese chloride; D002118:Calcium