نتایج جستجو برای: cytochromes
تعداد نتایج: 26574 فیلتر نتایج به سال:
Heme proteins, such as hemoglobins and cytochromes, play important roles in various biological processes. Here we employ the two-photon excited photothermal effect as a contrast mechanism to map heme proteins distribution. Particularly, both a thermal lens scheme and a high-frequency modulation are utilized to enhance the signal-to-noise ratio. We demonstrate label-free imaging of individual re...
Aromatic cytokinins (ortho-topolin riboside, 6-benzylaminopurine riboside and 6-(2-hydroxy-3-methoxybenzyla mino)purine riboside) were tested for their possible interaction with human liver microsomal cytochromes P450 by absorption difference spectroscopy. All three compounds were shown to bind to the CYP enzymes producing a high to low spin shift of the heme iron yielding a Soret absorption ba...
The reductively dimethylated derivatives of horse and yeast iso1-ferricytochromes c have been prepared and characterized for use as NMR probes of the complexes formed by cytochrome c with bovine liver cytochrome b & and yeast cytochrome c peroxidase. The electrostatic properties and structures of the derivatized cytochromes are not significantly perturbed by the modifications ; neither are the ...
1. A study is presented of the effects of pH, transmembrane pH gradient and electrical potential on oxidoreductions of b and c cytochromes in ox heart mitochondria and 'inside-out' submitochondrial particles. 2. Kinetic analysis shows that, in mitochondria at neutral pH, there is a restraint on the aerobic oxidation of cytochrome b566 with respect to cytochrome b562. Valinomycin plus K+ acceler...
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