Results 21 to 30 of about 26,570 (248)

Cobalamins and cobalamin-dependent enzymes in Candida utilis [PDF]

Journal of Bacteriology, 1979
Candida utilis has been shown to contain 4.7 pmol of cobalamin per g of wet cell paste. Purification of the cobalamin showed it to be a mixture of methylcobalamin and adenosylcobalamin. Two cobalamin-dependent enzyme systems have been found in the yeast: methylcobalamin-dependent methionine biosynthesis and leucine 2,3-aminomutase.
J M, Poston, B A, Hemmings
openaire   +2 more sources

The Intestinal Microbiome in Dogs with Chronic Enteropathies and Cobalamin Deficiency or Normocobalaminemia—A Comparative Study

Animals, 2023
Cobalamin deficiency is a common sequela of chronic enteropathies (CE) in dogs. Studies comparing the intestinal microbiome of CE dogs with cobalamin deficiency to those that are normocobalaminemic are lacking.
Linda Toresson, Jan S. Suchodolski, Thomas Spillmann, Bruna C. Lopes, Johnathan Shih, Jörg M. Steiner, Rachel Pilla   +6 more
doaj   +1 more source

In Dogs With Chronic Enteropathies, Can Oral B12 Tablets Be Used to Treat Hypocobalaminaemia?

Veterinary Evidence, 2019
PICO question In dogs with chronic enteropathy does treatment with oral cobalamin compared to parenteral cobalamin provide serum cobalamin levels greater than 270 ng/L?
Avril McGinn
doaj   +1 more source

Cobalamin Scarcity Modifies Carbon Allocation and Impairs DMSP Production Through Methionine Metabolism in the Haptophyte Microalgae Tisochrysis lutea

Frontiers in Marine Science, 2020
Cobalamin (vitamin B12) is a cobalt-containing enzymatic cofactor involved in methionine synthesis. Provided only by select bacteria and archaea in marine systems, this vitamin is known to limit primary production in different oceanic areas ...
Charlotte Nef, Céline Henry, Élodie Nicolau, Jean-Baptiste Bérard, Fabienne Hervé, Amandine M. N. Caruana, Raymond Kaas, Francis Mairet, Matthieu Garnier   +8 more
doaj   +1 more source

Gene identification for the cblD defect of vitamin B12 metabolism [PDF]

, 2008
Background Vitamin B12 (cobalamin) is an essential cofactor in several metabolic pathways. Intracellular conversion of cobalamin to its two coenzymes, adenosylcobalamin in mitochondria and methylcobalamin in the cytoplasm, is necessary for the ...
Rosenblatt, David S., Lerner-Ellis, Jordan P, Stucki, Martin, Suormala, T, Baumgartner, Matthias R; https://orcid.org/, Baumgartner, Matthias R., Fowler, Brian, Lerner-Ellis, Jordan P., Newbold, R F, Newbold, Robert F, Coelho, D, Fowler, B, Lerner-Ellis, J P, Newbold, Robert F., Rosenblatt, D S, Coelho, David, Suormala, Terttu, Rosenblatt, David S, Stucki, M, Baumgartner, M R   +19 more
core   +1 more source

Vitamin B12 in Cats: Nutrition, Metabolism, and Disease

Animals, 2023
Cobalamin is a water-soluble molecule that has an important role in cellular metabolism, especially in DNA synthesis, methylation, and mitochondrial metabolism. Cobalamin is bound by intrinsic factor (IF) and absorbed in the ileal tract.
Gerardo Siani, Beatrice Mercaldo, Maria Chiara Alterisio, Antonio Di Loria   +3 more
doaj   +1 more source

COBALAMIN DEFICIENCY IN THE ELDERLY

Mediterranean Journal of Hematology and Infectious Diseases, 2020
Older people are at risk for cobalamin (vitamin B12) deficiency because of a number of common disorders (e.g. autoimmune gastritis) and drugs (e.g. antacids) that may alter its absorption and utilization. The prevalence of cobalamin deficiency increases with age, resulting particularly elevated in frail and institutionalized subjects.
Marchi, Giacomo, Busti, Fabiana, Lira Zidanes, Acaynne, Vianello, Alice, Girelli, Domenico   +4 more
openaire   +5 more sources

Effect of Administration Route on the Pharmacokinetics of Cobalamin in Elderly Patients: A Randomized Controlled Trial

Current Therapeutic Research, 2014
Background: The gold standard for cobalamin deficiency treatment is administration of cobalamin by intramuscular injection. The injection is painful and inconvenient, particularly for elderly persons.
Monique P.H. Tillemans, PharmD, Eline M.V.J. Donders, MD, Sjoerd L. Verweij, PharmD, Ruud T.M. Van der Hoeven, PharmD, Kees J. Kalisvaart, MD, PhD   +4 more
doaj   +1 more source

Serum cobalamin and methylmalonic acid concentrations in juvenile dogs with parvoviral enteritis or other acute enteropathies

Journal of Veterinary Internal Medicine, 2023
Background Low serum cobalamin concentrations have been associated with ileal malabsorption in dogs with chronic enteropathy. Increased serum methylmalonic acid (MMA) concentrations indicate cobalamin deficiency on a cellular level.
Michael Hung, Justin Heinz, Jӧrg M. Steiner, Jan Suchodolski, Jonathan Lidbury   +4 more
doaj   +1 more source

Membrane transport of cobalamin

, 2022
A wide variety of organisms encode cobalamin-dependent enzymes catalyzing essential metabolic reactions, but the cofactor cobalamin (vitamin B12) is only synthesized by a subset of bacteria and archaea.
Mark Nijland, Dirk J. Slotboom, Chancievan Thangaratnarajah, Slotboom, Dirk J., Martínez Felices, Jose M., Thangaratnarajah, Chancievan; id_orcid, Nijland, Mark, Martínez Felices, Jose M.; id_orcid, Nijland, Mark; id_orcid, Litwack, Gerald, Jose M. Martínez Felices, Thangaratnarajah, Chancievan   +11 more
core   +1 more source