perfine structure indicative of an exchange-coupled manganese center in signals near g = 4 in ammonia-treated PS II preparations.In addition, Baumgarten et al.34 measured light-induced changes in the magnetic susceptibility of fluoride-treated PS II preparations, which exhibit an altered EPR signal at g -4.2 in the S2 state,7•35 that they interpreted as evidence of a magnetically coupled site. These chemically inhibited preparations, although giving rise to altered EPR properties, have been considered as possible analogues for the native g = 4.1 species, with the suggestion that both this signal and the multiline signal may originate from the same multinuclear cluster. However, we note that addition of exogenous ligands has been seen to significantly alter exchange couplings and bridging structure within multisite metalloprotein complexes, either by disrupting existing bridges or by leading to
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.