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Energetics of Primary Charge Separation in Bacterial Photosynthetic Reaction Center Mutants:Triplet Decay in Large Magnetic Fields
horseradish peroxidase lignin peroxidase enzymatic oxidations N-demethylation methylene blue azure B azure C
2016/5/24
The triplet state of aromatic molecules forms and decays by intersystem crossing, as originally demonstrated by Kasha and Lewis. By contrast, the triplet state of the primary electron donor, 3 P, in p...
Excited State Electronic Asymmetry of the Special Pair in Photosynthetic Reaction Center Mutants:Absorption and Stark Spectroscopy
Dimerization Electron Transport Electrons Hydrogen Bonding Models, Chemical Mutagenesis, Site-Directed Oxidation-Reduction Photosynthetic Reaction Center Complex Proteins Rhodobacter sphaeroides Spectrophotometry Static Electricity
2016/5/23
The electronic absorption line shape and Stark spectrum of the lowest energy Q(y)() transition of the special pair in bacterial reaction centers contain a wealth of information on mixing with charge t...
Temperature Dependece of the Qy Resonance Raman Spectra of Bacteriochlorophylls,the Primary Electron Donor,and Bacteriopheophytins in the Bacterial Photosynthetic Reaction Center
Bacteriochlorophylls chemistry Electron Transport Infrared Rays Light-Harvesting Protein Complexes Pheophytins chemistry Photosynthetic Reaction Center Complex Proteins chemistry Research Support, U.S. Gov't, Non-P.H.S. Research Support,U.S. Gov't,P.H.S. Rhodobacter sphaeroides chemistry Spectrophotometry
2016/5/23
Qy-excited resonance Raman spectra of the accessory bacteriochlorophylls (B), the bacteriopheophytins (H), and the primary electron donor (P) in the bacterial photosynthetic reaction center (RC) of Rh...
Photosynthetic Reaction Center Mutagenesis via Chimeric Rescue of a Non-functional Rhodobacter capsulatus puf Operon with Sequences from Rhodobacter sphaeroides
photosynthesis recombination bacteria energy transfer antenna
2016/5/23
Photosynthetically active chimeric reaction centers which utilize genetic information from both Rhodobacter capsulatus and Rb. sphaeroides puf operons were isolated using a novel method termed chimeri...
Spectroscopic and Redox Properties of Sym1 and (M)F195H Rhodobacter capsulatus Reaction Center Symmetry Mutants Which Affect the Initial Electron Donor
Circular Dichroism Electron Spin Resonance Spectroscopy Electron Transport Genes, Bacterial Kinetics Light-Harvesting Protein Complexes Mutation Oxidation-Reduction Photosynthetic Reaction Center Complex Proteins Plasmids Protein Conformation Rhodobacter capsulatus Spectrophotometry
2016/5/23
The redox properties, absorption, electroabsorption, CD, EPR, and P+QA- recombination kinetics have been measured for the special pairs of two mutants of Rhodobacter capsulatus reaction centers involv...
Biochemical Characterization and Electron-Transfer Reactions of sym1,a Rhodobacter capsulatus Reaction Center Symmetry Mutant which Affects the Initial Electron Donor
Biochemical Characterization Electron-Transfer Reactions sym1 Rhodobacter capsulatus Reaction Center Initial Electron Donor
2016/5/23
A 51 bp section of the Rhodobacter capsulatus photosynthetic reaction center M subunit gene (nucleotides M562-M612 of the pufM structural sequence) encoding amino acids M187-M203 was replaced by the h...
Stark Effect Spectroscopy of the Rhodobacter sphaeroides Reaction Center Heterodimer Mutant
Rhodobacter sphaeroides Macromolecular Substances Light-Harvesting Protein Complexes Photosynthetic Reaction Center Complex Proteins Bacterial Proteins Spectrophotometry Mutation Thermodynamics
2016/5/23
The effect of an electric field has been measured on the absorption spectrum (Stark effect) of the heterodimer mutant (M)H202L of Rhodobacter sphaeroides reaction centers, where the primary electron d...
A Structural Model for the Photosynthetic Reaction Center
Structural Model Photosynthetic Reaction Center
2016/5/20
We describe here the synthesis and characterization of the solution conformation of a molecule which brings into close proximity the principal molecular components believed to participate in the initi...
A Covalently Bound Dimeric Derivative of Pyrochlorophyllide a. A Possible Model for Reaction Center Chlorophyll
Dimeric Derivative Pyrochlorophyllide Reaction Center Chlorophyll
2016/5/20
Molecular aggregation of chlorophyll has been the subject of intense study in several While there is good evidence for keto carbonyl-Mg interactions in nonbasic solvents, there is much less structural...
Two new requirements for producing normal ribosomes: (I) A novel helicase is needed for snoRNP biogenesis, and; (II) Pseudouridine modifications in the reaction center are important for ribosome function
Eukaryotic cells contain protein particles ribosomes RNA nucleotide pseudouridine
2014/12/11
Eukaryotic cells contain scores of small nucleolar RNAs (snoRNAs) that are complexed with proteins in particles known as snoRNPs. SnoRNPs function in processing of ribosomal RNA (rRNA) and nucleotide ...