Results 181 to 190 of about 1,973 (233)

Oxidative degradation of dihydrofolate and tetrahydrofolate

Canadian Journal of Biochemistry, 1970
7,8-Dihydrofolate has been degraded oxidatively using ferricyanide under anaerobic conditions. Three reaction pathways have been found for this oxidation, and these pathways can be controlled by variation of the pH and by the nature of the buffer anion.
D, Chippel, K G, Scrimgeour
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THE EFFECT OF TETRAHYDROFOLATE ON TETRAHYDROBIOPTERIN METABOLISM

Journal of Intellectual Disability Research, 1986
5-Methyltetrahydrofolate and vitamin B12 appear to be required for the biosynthesis of tetrahydrobiopterin. A deficiency of either could be sufficient to bring about neurological change which can be corrected by reversing the deficiency. Patients with senile dementia could possibly be benefited by the administration of 5-methyltetrahydrofolate.
C G, Hamon, J A, Blair, P A, Barford
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Fluorescence properties of tetrahydrofolate and related compounds

Analytical Biochemistry, 1963
Abstract A survey of fluorescence characteristics of tetrahydrofolate and related compounds has been carried out with an Aminco-Bowman Spectrophotofluorometer. Dihydrofolate and all the tetrahydrofolate derivatives examined, except 5,10-methenyltetrahydrofolate, show maximum excitation between 300 to 320 mμ and maximum fluorescence between 360 to 425
K, UYEDA, J C, RABINOWITZ
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The extinction coefficient of Purified tetrahydrofolic acid

Biochemical and Biophysical Research Communications, 1965
Earlier studies (O’Dell et al --: t 1947; Hatefi et al _--, 1960; Rabinowitz, 1960) concerning the determination of the extinction coefficient of tetrahydrofolic acid (THFA) have used, for the most part, material which was not highly purified. Moreover, even the concentration of purified THFA has not been estimated by any direct means because, due to ...
L M, PRESCOTT, R C, WOOD, E L, SPECK
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Purification of tetrahydrofolate dehydrogenase by affinity chromatography

Biochimica et Biophysica Acta (BBA) - Enzymology, 1972
Abstract Tetrahydrofolate dehydrogenase (5,6,7,8-tetrahydrofolate:NADP + oxidoreductase, EC 1.5.1.3; formerly known as dihydrofolate reductase) from a subline of the L1210 lymphoma has been purified to apparent homogeneity with high recovery by simple steps using agarose to which the enzyme inhibitor amethopterin was coupled. A crude (NH 4 ) 2 SO 4
J, Gauldie, B L, Hillcoat
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Tetrahydrofolate biosynthesis and distribution in higher plants

Biochemical Society Transactions, 2005
One-carbon transfer reactions are mediated by H4F (tetrahydrofolate), a soluble coenzyme (vitamin B9) that is synthesized de novo by plants and microorganisms, and absorbed from the diet by animals. H4F synthesis in plants is quartered between the plastids, the cytosol and the mitochondria, a spatial distribution that is not observed in the other ...
Sahr, Tobias, Ravanel, Stéphane, Rébeillé, Fabrice   +2 more
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Tetrahydrofolate cofactors in the housefly Musca domestica

Comparative Biochemistry and Physiology, 1969
Abstract 1. 1. Dialyzed aqueous extract of acetone powder of houseflies was chromatographed on a DEAE column. 2. 2. Three tetrahydrofolate cofactors were distinctly separated and measured by microbial assays. 3. 3. Chicken pancreas conjugase was used to detect any polyglutamate derivatives. 4. 4.
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Cytochemical Identification of Tetrahydrofolate in Human Leukocytes

American Journal of Clinical Pathology, 1979
Utilizing the ability of molybdenum dioxide dichloride to form a black insoluble precipitate with tetrahydrofolate, a cytochemical test for rapid detection of tetrahydrofolate in human leukocytes was developed. The test may be useful in distinguishing deficiency of vitamin B12 or folate or both from other disorders of erythropoiesis characterized by ...
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Analogs of Tetrahydrofolic Acid XX

Journal of Pharmaceutical Sciences, 1964
B.R. Baker, Beng-Thong Ho
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Thyminyl Derivatives of Tetrahydrofolate^*

Biochemistry, 1967
V S, Gupta, F M, Huennekens
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