Results 91 to 100 of about 3,260 (236)

Investigating the origins of B12 biosynthesis in the most ancient roots of the tree of life [PDF]

open access: yes, 2015
Vitamin B12, also known as B12 or cobalamin, is a vital nutrient required across all branches of life, but the ability to synthesize this complex molecule de novo is limited to only a few archaea and bacteria.
Alicea, Edil   +5 more
core  

Prevalence of Cobalt in the Environment and Its Role in Biological Processes. [PDF]

open access: yesBiology (Basel), 2023
Genchi G   +4 more
europepmc   +1 more source

Relationship between Vitamin B12 and Cobalt Metabolism in Domestic Ruminant: An Update [PDF]

open access: yes
[EN] Cobalt, as a trace element, is essential for rumen microorganisms for the formation of vitamin B12. In the metabolism of mammals, vitamin B12 is an essential part of two enzymatic systems involved in multiple metabolic reactions, such as in the ...
Alonso de la Varga, Marta Elena   +5 more
core   +1 more source

Dual C-Br Isotope Fractionation Indicates Distinct Reductive Dehalogenation Mechanisms of 1,2-Dibromoethane in Dehalococcoides- and Dehalogenimonas-Containing Cultures. [PDF]

open access: yesEnviron Sci Technol, 2023
Palau J   +9 more
europepmc   +1 more source

Corrinoid-Metabolismus in Sporomusa ovata H1

open access: yes, 2012
Sporomusa ovata H1 produces acetic acid from methanol plus CO2. Two vitamin B12 derivates are involved in this pathway: p-cresolylcobamide and phenolylcobamide. The biosynthesis of these corrinoids involves two unusual reactions: cleavage of tyrosine into phenol and p-cresol and O-glycosidic ligation of these aromatics to ribose.
openaire   +3 more sources

Coα-(1H-Imidazolyl)-Coβ-methylcob(III)amide: Model for Protein-Bound Corrinoid Cofactors [PDF]

open access: bronze, 2000
Mario Fasching   +5 more
openalex   +1 more source

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