Abstract
Dimethyl-methylenedioxy- p-benzoquinone is found to be an excellent mediator for photoreductions by photosystem II only, i.e. in the presence of dibromothymoquinone (DBMIB) blocking reduction by photosystem I. The new quinone system is highly autoxidizable, thus also supporting pseudocyclic electron flow involving photosystem II only. It is not affected by the uncoupler gramicidin at external pH 8, whereas a phenylenediamine acceptor system is strongly inhibited at this pH. This is taken as further support for the notion that the internal pH affects acceptor systems for photosystem II and that therefore the reduction site of these systems occurs in the internal pH range.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
