Results 191 to 200 of about 3,260 (236)

Metal Complexes of Corroles and Other Corrinoids

, 1995
Several tetrapyrroles are employed by Nature to carry out fundamental biological functions and synthetic models compounds have been extensively used in order to understand the mechanisms of action of natural systems.
S. Licoccia, R. Paolesse
semanticscholar   +3 more sources

Enzymatic reactions involving corrinoids.

Annual Review of Biochemistry, 1968
H. Hogenkamp
semanticscholar   +4 more sources

Vitamin B-12 (Cyanocobalamin, Corrinoids)

Laboratory Tests for the Assessment of Nutritional Status, 2018
H. Sauberlich
semanticscholar   +3 more sources

Quantification of corrinoids in methanogenic bacteria

Current Microbiology, 1980
Corrinoids in several diverse species of methanogens were quantified by a bioassay utilizingEscherichia coli 113-3, a corrinoid auxotroph. All five species examined contained >0.65 nmol corrinoid/mg dry cells when grown on H2/CO2 as carbon and energy source.
J. G. Zeikus, J. A. Krzycki
openaire   +3 more sources

Redox Potentials of Cobalt Corrinoids with Axial Ligands Correlate with Heterolytic Co-C Bond Dissociation Energies.

Inorganic Chemistry, 2017
We investigate the correlations between the redox potentials of nonalkylated cobalt corrinoids and the Co-C bond dissociation energies (BDEs) of the methylated species with an aqua or histidine axial ligand. A set of cobalt corrinoids, cobalamin, and its
Y. Morita, K. Oohora, Akiyoshi Sawada, T. Kamachi, K. Yoshizawa, Takashi Hayashi   +5 more
semanticscholar   +1 more source

Zur Struktur rhodiumhaltiger Corrinoide [PDF]

Liebigs Annalen der Chemie, 1980
AbstractDurch Umsetzung von Hydrogenobyrinsäure‐a,c‐diamid (1) mit [Rh(CO)2Cl]2 in Eisessig/Ethanol (1:1; Vol.: Vol.) erhält man als Hauptprodukt Rhodibyrinsäure‐a,c‐diamid 2. Die Identität von 2 wird durch Röntgenstrukturanalyse bestätigt. Veresterung von 2 mit Methanol/Schwefelsäure führt neben Rhodibyrinsäure‐pentamethylester‐a,c‐diamid 3a zu den ...
William S. Sheldrick, Ludger Ernst, Volker B. Koppenhagen, Bernd Dresow, Gerhard Schlingmann   +4 more
openaire   +1 more source

Combined C and Cl isotope effects indicate differences between corrinoids and enzyme (Sulfurospirillum multivorans PceA) in reductive dehalogenation of tetrachloroethene, but not trichloroethene.

Environmental Science and Technology, 2014
The role of the corrinoid cofactor in reductive dehalogenation catalysis by tetrachloroethene reductive dehalogenase (PceA) of Sulfurospirillum multivorans was investigated using isotope analysis of carbon and chlorine.
J. Renpenning, Sebastian F Keller, Stefan Cretnik, O. Shouakar‐Stash, M. Elsner, T. Schubert, I. Nijenhuis   +6 more
semanticscholar   +1 more source

Side chains of cobalt corrinoids control the sensitivity and selectivity in the colorimetric detection of cyanide.

Inorganic Chemistry, 2009
Substitution of Co(III)-bound water by cyanide allows the rapid colorimetric detection of micromolar amounts of cyanide with cobalt corrinoids. Negatively charged side chains at the periphery of these metal-based sensors increase the selectivity of ...
Christine Männel-Croisé, Felix Zelder
semanticscholar   +1 more source

Cobalt and Corrinoid Transport and Biochemistry

2012
In this chapter, we focus on the biochemistry of non-corrin cobalt and on a subset of corrinoid-containing enzymes. We review the import of cobalt in prokaryotes and discuss two members of the non-corrin cobalt-dependent enzymes, nitrile hydratase and methionine aminopeptidase.
Valentin Cracan, Ruma Banerjee
openaire   +3 more sources

Corrinoid and thiol dependent threonine decarboxylation

Biochemical and Biophysical Research Communications, 1976
Summary A novel system for the decarboxylation of L-threonine requiring the presence of certain aquocorrinoids, preferably diaquocobyric acid, and of a thiol is described. The reaction shows a marked optimum at a pH value of about 8. Other L-amino acids, with the exception of L-serine, are much less reactive. Optical data point to a ligand attachment
Susan H. Ford, Herbert C. Friedmann
openaire   +3 more sources