Results 141 to 150 of about 2,756 (173)
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Biopterin Synthesis Defects: Problems in Diagnosis
Pediatrics, 1984Hyperphenylalaninemia due to a biopterin synthesis defect was detected in an infant with decreased biopterin and increased neopterin levels in plasma and urine. Tetrahydrobiopterin (BH4) administration normalized plasma phenylalanine levels. CSF biopterin and neurotransmitter metabolite levels were normal and with the infant's normal growth and ...
G, Hoganson +7 more
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Hyperphenylalaninaemia caused by defects in biopterin metabolism
Journal of Inherited Metabolic Disease, 1985AbstractThe hepatic phenylalanine hydroxylating system consists of three essential components, phenylalanine hydroxylase, dihydropteridine reductase and the non‐protein coenzyme, tetrahydrobiopterin. The reductase and the pterin coenzyme are also essential components of the tyrosine and tryptophan hydroxylating systems.
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The Effect of Exercise on Plasma Biopterin Levels
Neuropsychobiology, 1994The plasma total biopterin and tetrahydrobiopterin levels of 29 normal volunteers were measured before and after exercise by ergometer, and those of 10 were also measured until 24 h after exercise. An increase of plasma total biopterin and tetrahydrobiopterin was observed only after strong exercise, which exhausted the subjects, the ratio of ...
M, Mizutani +4 more
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Diastereomers of Neopterin and Biopterin in Human Urine
Biological Chemistry Hoppe-Seyler, 1992A new pteridine compound, named umanopterin, was isolated from human urine both of cancer patients and non-cancer controls. The structure was confirmed to be 2-amino-4(3H)-oxo-6-[(1'R,2'R)-1',2',3'-trihydroxypropyl]pteridine , a diastereomer of neopterin.
S, Ogiwara +4 more
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Biopterin: Reduced form in Ascaris lumbricoides
Experimental Parasitology, 1970Abstract A blue fluorescent substance which was supposed to be “Ascaris-blue” was extracted from Ascaris muscle. After Chromatographic purification, the substance was identified as biopterin, 2-amino-4-hydroxy-6-(erythro-1′, 2′-dihydroxypropyl)pteridine.
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Reindarstellung von Biopterin und 7-Biopterin
Hoppe-Seyler´s Zeitschrift für physiologische Chemie, 1962H. Rembold, H. Metzger
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BIOPTERIN DERIVATIVES IN SENILE DEMENTIA
The Lancet, 1979R J, Leeming, J A, Blair, V, Melikian
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Biopterin and Folic Acid Deficiency
The American Journal of Clinical Nutrition, 1967A F, Fleming, H P, Broquist
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