Now showing items 1-10 of 26
Purification and properties of an oxygen-evolving reaction center complex from photosystem II membranes : A simple procedure utilizing a non-ionic detergent and elevated ionic strength
(Elsevier, 1986-03-03)
A method is reported for the isolation of a highly resolved oxygen-evolving photosystem II reaction center preparation. This preparation can be separated from the more complex photosystem II membranes isolated by the ...
The mechanism of amine inhibition of the photosynthetic oxygen evolving complex : Amines displace functional chloride from a ligand site on manganese
(Elsevier, 1983-10-17)
Amines inhibit photosynthetic oxygen evolution by binding to manganese in the oxygen evolving complex. This inhibition is more effective if chloride is absent. Steady-state kinetic analyses show that ammonia and chloride ...
Monovalent cations (Na+, K+, Cs+) inhibit calcium activation of photosynthetic oxygen evolution
(Elsevier, 1989-02-13)
In the absence of the 17 and 23 kDa water-soluble polypeptides, the oxygen-evolving complex of photosystem II requires addition of Cl- and Ca2+ to maximize rates of oxygen evolution activity. We have found that monovalent ...
Photosystem II -- Mediated cyclic photophosphorylation
(Elsevier, 1976-02-09)
DCMU-sensitive synthesis of ATP can be shown to continue in KCN-treated chloroplasts after cessation of O2 evolution. The catalyst for this reaction, -phenylenediamine, also stimulates synthesis of ATP in NH2OH-treated ...
Fluorescence-based biosensing of zinc using carbonic anhydrase
(Kluwer Academic Publishers; Springer Science+Business Media, 2001-09)
Measurement of free zinc levels and imaging of zinc fluxes remains technically difficult due to low levels and the presence of interfering cations such as Mg and Ca. We have developed a series of fluorescent zinc indicators ...
Cation-induced, inhibitor-resistant photosystem II reactions in cyanobacterial membranes
(Elsevier, 1981-06-16)
Ferricyanide-supported oxygen evolution in sonic vesicles from the cyanobacterium is only partially sensitive to inhibition by 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone (DBMIB), and addition of cations to inhibited ...
The production of superoxide anion radicals in the reaction of reduced flavins and flavoproteins with molecular oxygen
(Elsevier, 1969-09-10)
The generation of O2-- in the reaction of reduced flavins and several flavoproteins has been shown. This has been demonstrated by the ability to catalyse the aerobic reduction of cytochrome and the inhibition of this ...
Pre-resonance Raman spectra of adriamycin
(Elsevier, 1976-08-23)
Pre-resonance Raman spectra have been obtained for aqueous solutions of adriamycin. All bands are attributable to the anthracycline chromophore and are vibrations coupled to the first (20,800 cm-1) electronic transition ...
Heterobifunctional cross-linking of a monoclonal antibody with 2-methyl-N1-benzenesulfonyl-N4-bromoacetylquinonediimide
(Elsevier, 1989-02-15)
The Cyssor reagent, 2-methyl-N1-benzenesulfonyl-N4-bromoacetylquinonediimide, which will cleave a protein chain at Cys under acidic conditions, cross-linked unreduced and partially reduced antibody at pH 8.0. No cleavage ...