Results 11 to 20 of about 36,702 (164)

Prebiotic Synthesis of Aspartate Using Life’s Metabolism as a Guide

open access: yesLife, 2023
A protometabolic approach to the origins of life assumes that the conserved biochemistry of metabolism has direct continuity with prebiotic chemistry. One of the most important amino acids in modern biology is aspartic acid, serving as a nodal metabolite
Stuart A. Harrison   +3 more
doaj   +1 more source

Biosynthesis of food constituents: Vitamins. 2. Water-soluble vitamins: Part 1 - a review

open access: yesCzech Journal of Food Sciences, 2007
This review article gives a survey of the generally accepted biosynthetic pathways that lead to water-soluble vitamins in microorganisms, plants and some animals.
Jan Velíšek, Karel Cejpek
doaj   +1 more source

All-enzymatic HPLC method for determination of individual and total contents of vitamin B6 in foods

open access: yesFood & Nutrition Research, 2012
Background : There is a need for a reliable and accurate method for quantification of each of the seven individual vitamin B6 compounds including pyridoxine-β-glucoside in foods.
Huong Thi Viet Do   +3 more
doaj   +1 more source

Preparation of ZIF-8 and Its Application in Determination of Pyridoxine and Pyridoxal in Ginkgo Seeds by Ultra-Performance Liquid Chromatography

open access: yesFoods, 2022
A new rapid and accurate method was developed for simultaneous determination of pyridoxine and pyridoxal in ginkgo seeds, using ultra-performance liquid chromatography (UPLC) equipped with a fluorescence detector.
Yuan Gao   +5 more
doaj   +1 more source

Synthesis of B6 vitamin [PDF]

open access: yesHemijska Industrija, 2009
The importance of vitamin B6 has been known since its discovery in the 1940's. Chemical tests, elestrometric titration determinations, and absorption spectrum studies showed that this vitamin exists in three major chemical forms: pyridoxine (an alcohol),
Vučijak Nevena Ž.   +4 more
doaj   +1 more source

Phosphorescence of Pyridoxal

open access: yesJournal of Biological Chemistry, 1969
Abstract The effect of pH on the relative distribution of pyridoxal structures in aqueous solution was examined by fluorescence spectroscopy. The hemiacetal structure, which is the predominant species at neutral pH, exhibits a symmetrical emission band at 378 mµ and is characterized by a quantum yield of 0.08.
J E, Wampler, J E, Churchich
openaire   +2 more sources

SNZ3 Encodes a PLP Synthase Involved in Thiamine Synthesis in Saccharomyces cerevisiae

open access: yesG3: Genes, Genomes, Genetics, 2019
Pyridoxal 5′-phosphate (the active form of vitamin B6) is a cofactor that is important for a broad number of biochemical reactions and is essential for all forms of life.
Michael D. Paxhia, Diana M. Downs
doaj   +1 more source

Simultaneous Determination of Underivatized Vitamin B1 and B6 in Whole Blood by Reversed Phase Ultra High Performance Liquid Chromatography Tandem Mass Spectrometry. [PDF]

open access: yesPLoS ONE, 2015
Vitamin B1 (thiamine-diphosphate) and B6 (pyridoxal-5'phosphate) are micronutrients. Analysis of these micronutrients is important to diagnose potential deficiency which often occurs in elderly people due to malnutrition, in severe alcoholism and in ...
Johan Puts   +3 more
doaj   +1 more source

Vitamin B6 Acquisition and Metabolism in Schistosoma mansoni

open access: yesFrontiers in Immunology, 2021
Schistosomes are parasitic platyhelminths that currently infect >200 million people globally. The adult worms can live within the vasculature of their hosts for many years where they acquire all nutrients necessary for their survival and growth.
Akram A. Da’dara   +4 more
doaj   +1 more source

Pyridoxal 5'-phosphate is a slow tight binding inhibitor of E. coli pyridoxal kinase. [PDF]

open access: yesPLoS ONE, 2012
Pyridoxal 5'-phosphate (PLP) is a cofactor for dozens of B(6) requiring enzymes. PLP reacts with apo-B(6) enzymes by forming an aldimine linkage with the ε-amino group of an active site lysine residue, thus yielding the catalytically active holo-B(6 ...
Mohini S Ghatge   +10 more
doaj   +1 more source

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