Results 241 to 250 of about 196,937 (296)
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Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1984
Abstract Myoglobin is photooxidized when exposed to visible light in the presence of a sensitizer. In 8 M urea medium this photooxidation is followed by photodynamic interpeptide crosslinking. A partial inhibition of crosslinking is caused by lysine, mercaptoethanol and hydroxylamine, and by amidination of NH2 groups in the protein molecule. Complete
J. Van Steveninck +2 more
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Abstract Myoglobin is photooxidized when exposed to visible light in the presence of a sensitizer. In 8 M urea medium this photooxidation is followed by photodynamic interpeptide crosslinking. A partial inhibition of crosslinking is caused by lysine, mercaptoethanol and hydroxylamine, and by amidination of NH2 groups in the protein molecule. Complete
J. Van Steveninck +2 more
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Stepwise Fusion of Porphyrin β,β′-Pyrrolic Positions to Imidazole Rings
Organic Letters, 2011 International audienceA strategy for the stepwise annulation of pyrrolic rings of a porphyrin to imidazole rings is presented. Mono(imidazole), Janus and corner bis(imidazole), T-shaped tris(imidazole), and tetrakis(imidazole) porphyrins have been ...
Mamadou Lo +2 more
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Computational study of imidazole and methyl imidazoles
Journal of Molecular Structure: THEOCHEM, 1994Abstract A semiempirical and ab initio study of the structures of imidazole, methyl imidazoles and the corresponding protonated and deprotonated ions is presented. The energies of the different isomers and tautomers are discussed and the protonation and deprotonation energies are given.
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Stimulation of glycolysis by imidazole
Life Sciences, 1973Abstract Imidazole stimulated glycolysis by rat diaphragm homogenates; this effect increased as the concentration of imidazole was raised. The simultaneous changes in concentration of some of the glycolytic intermediates suggested an action of imidazole at a step between triose phosphate and pyruvate.
R, Parvin, N, Kalant
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Condensation of mononucleotides by imidazole
Journal of Molecular Evolution, 1971The condensation of thymidine-5′-monophosphate was carried out in the presence of imidazole in aqueous solutions at neutral pH. Formation of oligo-deoxyribonucleotides up to four units was observed.
J D, Ibanez, A P, Kimball, J, Oró
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Imidazole: Fungitoxic Derivatives
Science, 1967Study of several new types of fungitoxic derivatives of imidazole reveals that imidazoles substituted on the imine nitrogen atom are likely to be active if the substituent is electron-attracting, and if the atom connecting it to the imidazolyl moiety has tetrahedral geometry.
H, Tolkmith +3 more
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Synthesis of difluoromethylthio imidazole from methylthio imidazole
Journal of Fluorine Chemistry, 1996Abstract Demethylation of methylthio imidazole 1 via a Pummerer rearrangement onto the corresponding sulfoxide 2 afforded imidazole thiol 4 which was then difluoromethylated with the sodium chlorodifluoroacetate/NaI system in 71% overall yield.
Pierre Deprez, Jean-Paul Vevert
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Superelectrophilic Chemistry of Imidazoles
The Journal of Organic Chemistry, 2009The mechanistic and synthetic chemistry of imidazole-based superelectrophiles has been studied. The protonated imidazole ring, or imidazolium group, is shown to enhance the electrophilic reactivity of an adjacent carboxonium group (compared to a related monocationic species).
Matthew R, Sheets +7 more
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On the photochemical phosphorylation of imidazole
Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1972Abstract It has not proved possible to repeat the reported anaerobic photophosphorylation of imidazole to produce imidazole 1-phosphate. The involvement of an analogous reaction in mitochondrial oxidative phosphorylation is therefore further in doubt.
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