Carotenoid-dependent singlet oxygen photogeneration in light-harvesting complex 2 of Ectothiorhodospira haloalkaliphila leads to the formation of organic hydroperoxides and damage to both pigments and protein matrix 1Institute of Basic Biological Problems, FRC PSCBR, Pushchino, Moscow, Russia 2Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, Moscow, Russia DOI 10.7717/peerj.16615 Academic Editor Rogerio Sotelo-Mundo Subject Areas Biochemistry, Biophysics, Microbiology...