Results 81 to 90 of about 3,260 (236)

Total Synthesis, Structure, and Biological Activity of Adenosylrhodibalamin, the Non-Natural Rhodium Homologue of Coenzyme B12. [PDF]

open access: yes, 2016
B12 is unique among the vitamins as it is biosynthesized only by certain prokaryotes. The complexity of its synthesis relates to its distinctive cobalt corrin structure, which is essential for B12 biochemistry and renders coenzyme B12 (AdoCbl) so ...
Deery, Evelyne   +8 more
core   +3 more sources

Supplementing lactating dairy cows with a vitamin B12 precursor, 5,6-dimethylbenzimidazole, increases the apparent ruminal synthesis of vitamin B12

open access: yesAnimal, 2015
Cobalamin (CBL), the biologically active form of vitamin B12, and its analogs, are produced by bacteria only if cobalt supply is adequate. The analogs differ generally by the nucleotide moiety of the molecule.
A. Brito   +4 more
doaj  

Influence of vitamin B12 and light on the formation of chlorosomes in green- and brown-colored Chlorobium species [PDF]

open access: yes, 1993
The specific Bchl a and c content of the vitamin B12-dependent Chlorobium limicola strain 1230 decreased strongly under vitamin B12 limitation. In comparison to a regularly grown culture (20 g vitamin B12/l) the specific Bchl c content of a B12-limited ...
Fischer, Ulrich   +3 more
core   +1 more source

ABC Transporter for Corrinoids in Halobacterium sp. Strain NRC-1

open access: yesJournal of Bacteriology, 2005
We report evidence for the existence of a putative ABC transporter for corrinoid utilization in the extremely halophilic archaeon Halobacterium sp. strain NRC-1.
J. Woodson   +2 more
semanticscholar   +1 more source

Synthesis of Cobalamin Analogues Using Enzymatic and Chemical Modification Methods, and Subsequent Identification of Cobalamin Localisation in a Variety of Organisms [PDF]

open access: yes, 2017
Cobalamin, also known as vitamin B12, is an essential nutrient for many different organisms including mammals, fish, birds, nematodes, and a variety of bacteria. However, cobalamin is only synthesised by a few bacteria and archaea.
Nemoto-Smith, Emi H
core   +1 more source

Über die a-b-Isomerie der Cyano-aquo-corrinoide

open access: yesZeitschrift für Naturforschung B, 1967
Two isomers, a and b, of the tetracarbonic acid and some tri-, di- and monocarbonic acids, all derived from cobyric acid, have been crystallized. Two cobinamide monocarbonic acids have also been crystallized. The two crystalline tetracarbonic acids are both stable at 20 °C. They differ from each other in crystal shape.
Rainer Bieganowski   +3 more
openaire   +3 more sources

Charakterisierung der mikrobiellen Dehalogenierung mit der komponenten-spezifischen stabilen Isotopenanalyse [PDF]

open access: yes, 2015
Im Verlauf des letzten Jahrzehnts haben sich verschiedene Konzepte für die Anwendung in der komponenten-spezifischen stabilen Isotopenanalyse entwickelt, die einen Zugang zur Evaluierung von der in situ (Bio-)Transformation, wie auch (bio-) chemischen ...
Renpenning, Julian
core   +1 more source

MICROBIAL DEGRADATION OF CORRINOIDS I.VitaminB12 [PDF]

open access: bronze, 1964
W. M. Scott   +3 more
openalex   +1 more source

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