Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"tyrosine radical"”.
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Chemical Methods for Studying the Biosynthesis of Lantibiotics and Prostaglandins
… in the synthesis of prostaglandins via a radical mechanism. Prostaglandins play a number of roles in the body, including the regulation of blood flow to certain organs, controlling transport across membranes, and the stimulation of inflammation. A tyrosine radical is proposed to initiate …
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Electron Transfer on the Donor and Acceptor Sides of Photosystem II Explored by Site-Directed Mutagenesis and Kinetic Spectroscopy
… tools to investigate a new model of neutral tyrosine radical, $\rm Y\sb{Z}\sp\cdot,$ introduced by Gilchrist et al. (1995) and Hoganson et al. (1995). In this new model, $\rm Y\sb{Z}$ is not simply a redox active residue in the electron transfer reactions, but is also directly involved in the …
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High-frequency time domain electron paramagnetic resonance : methods and applications
… EPR spectra observed at 139.5 GHz of the stable tyrosine radical in ribonucleotide reductase (RNR) revealed the existence of a hydrogen bond in RNR from yeast, chapter 1. The bond length and orientation were determined from the nuclear frequencies of the proton, detected by orientation selective …
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Photoinitiated proton-coupled electron transfer and radical transport kinetics in class la ribonucleotide reductase
… in biology, underpinning key processes such as radical transport, energy transduction, and enzymatic substrate activation. Ribonucleotide reductases (RNRs) rely on PCET to mediate the rate-limiting step in the synthesis of DNA precursors. E. coli class Ia RNR consists of two dimeric subunits: …
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Studies on the structure, function and mechanisms of the cbb3 type cytochrome c oxidase from Vibrio cholerae and the cytochrome bo3 ubiquinol oxidase from Escherichia coli
… the first adduct intermediate (A) decays into a radical intermediate (PM). It’s a four electron reduction of O2 in which two electrons comes from Fe2+, another from Cu+ and the source of fourth electron is still under debate. Injection of the first electron from electron donor will transform this …