Results 61 to 70 of about 3,260 (236)
Vitamin B12 status in health and disease: a critical review. Diagnosis of deficiency and insufficiency – clinical and laboratory pitfalls [PDF]
VoR added to record 23/01 ...
Sobczyńska-Malefora, Agata +4 more
core +1 more source
Food Science &Nutrition, Volume 12, Issue 11, Page 8675-8691, November 2024.Vitamin B12 is essential to human physiological processes, it might be challenging for vegans and vegetarians to get enough of it in their diets. Propionibacterium shermanii and Pseudomonas denitrificans have been demonstrated as promising fermented sources of vitamin B12. Vitamin B12 is naturally produced by P. denitrificans, but P.
Anjali Tripathi +9 more
wiley +1 more source
Production and utilization of pseudocobalamin in marine Synechococcus cultures and communities
Environmental Microbiology, Volume 26, Issue 10, October 2024.Pseudocobalamin levels in cultured Synechococcus cells are influenced by culture methods and growth conditions but remain consistently around 300 molecules per cell in environmental samples. The amount of pseudocobalamin in cells appears to be loosely coupled to the demand for pseudocobalamin by the enzyme methionine synthase (MetH).
Catherine C. Bannon +7 more
wiley +1 more source
Redox Conditions Determine Microbial Cobamide Production in Hyporheic Sediment [PDF]
, 2019 All kingdoms of life rely on cobalamin, a coenzyme produced by a subset of Bacteria and Archaea. Cobalamin belongs to a family of molecules called cobamides.
Seus, Laurel
core +1 more source
Food Risk Assess Europe, Volume 2, Issue 4, October 2024.Executive summary The Food Safety Authority of Ireland (FSAI) requested its Scientific Committee to advise on the criteria and analytical controls that should be considered when examining the potential use of new laboratory techniques in assessing food authenticity. A subcommittee of experts in various analytical fields was established to prepare draft
Pat O'Mahony +12 more
wiley +1 more source
Chemistry – A European Journal, Volume 30, Issue 49, September 2, 2024.To find the structural requirements of a B12‐derivative to bind and switch the btuB riboswitch we derivatised the corrin sidechains b and e as well as the apical ligand. While modifications at the sidechains have a large impact on the riboswitch, introduction of an apical adenosyl‐ligand restores the riboswitch fold.
Anastasia Musiari +3 more
wiley +1 more source
Current Aspects of Corrinoid Synthesis
, 1969 Proceedings of the Robert A. Welch Foundation Conferences on Chemical Research: XII.
openaire +3 more sources
The Ligand Substitution Reactions of Hydrophobic Vitamin B12 Derivatives. Reaction of Cobyric Acid Heptapropyl Ester with Heterocyclic N-donor Ligands [PDF]
, 2015 The hydrophobic cobyrinic acid heptapropyl ester corrinoids XCbs-Pr (axial ligand X=CN–, SO32–, CH3– and CH3CH2–) have been prepared from vitamin B12 by hydrolysis of the amide side chains and their conversion to propyl esters. Both the position of the γ-
Elawady, MA, Hamza, MSA, Marques, HM
core +1 more source
Trace metal requirements for microbial enzymes involved in the production and consumption of methane and nitrous oxide [PDF]
, 2012 Fluxes of greenhouse gases to the atmosphere are heavily influenced by microbiological activity. Microbial enzymes involved in the production and consumption of greenhouse gases often contain metal cofactors.
Glass, Jennifer B., Orphan, Victoria J.
core +3 more sources
Emission‐based sensing of cobalt (II) and vitamin B12 via a bis‐indole derivative
Luminescence, Volume 39, Issue 8, August 2024.In this study, a newly synthesized bis‐indole derivative has been successfully used in the analysis of both ionic cobalt and vitamin B12. The fluorescent bis‐indole ligand surrounds cobalt ions and acts similarly to the corrin ring in the structure of vitamin B12 in nature.
Taskin Mumcu +3 more
wiley +1 more source