Results 1 to 10 of about 208 (129)
Tetrahydro-6-biopterin is associated with tetrahydro-7-biopterin in primary murine mast cells [PDF]
FEBS Letters, 1992 Murine bone marrow‐derived mast cells proliferate in response to interleukin 3. In addition to 6‐biopterin, 7‐biopterin was identified in these cells by HPLC analysis of iodine oxidized extracts and by alkaline permanganate oxidation to the 6‐ and 7‐carboxylic acids. 7‐Biopterin comprised 31.9 (± 7.7)% of the total biopterin.
Irmgard Ziegler, L Hültner
exaly +3 more sources
An Efficient Synthesis of 2'-O-(β-D-Ribofuranosyl)biopterin
Pteridines, 2008 N2-(N,N-Dimethylaminomethylene)-3-[2-(4-nitrophenyl)ethyl]-1',2'-di-O-(trimethylsilyl)biopterin (4) was prepared from biopterin (1a, 86% overall yield) in 5 steps.
Tadashi Hanaya
exaly +2 more sources
Pteridines, 1995 The levels of neopterin, biopterin and the neopterin/biopterin ratio (NIB) were measured in urine samples taken from normal young and elderly control subjects, exceptionally healthy elderly control subjects classified according to the 'Senieur' protocol ...
R A Armstrong, J A Blair
exaly +2 more sources
Dystonia and Biopterin Deficiency
Pediatric Neurology Briefs, 1988 Five patients with childhood dystonia associated with reduced CSF biopterin, responsive to levodopa, and characterized by diurnal and exertional variation are reported from the Developmental and Metabolic Neurology Branch, National Institute of ...
J Gordon Millichap
doaj +4 more sources
The High Concentration of Biopterin In Breast Milk and It's Absorption During the Neonatal Period
Pteridines, 1995 Breast milk has been found to contain high levels of biopterin compounds, whose physiological roles have attracted attention through newly discovered functions, particularly. as a cofactor for biosynthesis of nitric oxide.
Iizuka Tadashi +7 more
doaj +1 more source
Evaluation of neopterin levels and kynurenine pathway in patients with acute coronary syndrome [PDF]
Acute and Critical Care, 2023 Background Coronary atherosclerosis is the leading cause of coronary artery disease. Several investigations have indicated that tear-sensitive plaques contain macrophages and T cells. Neopterin is an essential cellular immune response biomarker. The main
Ibrahim Kember +4 more
doaj +1 more source
Pteridines, 1990 Enzymatic conversion of stereoisomers of biopterin (3a-d) to the 7-oxo-biopterin isomers (4a-d) was performed with a new pterin 7-oxidase extracted from carp skin.
Takikawa Shin Ichiro, Matsuura Sadao
doaj +1 more source
Pteridines, 1995 Treatment of L-biopterin (I) with N,N-dimethyformamide dimethyl- (or diethyl)acetal and then with acetic anhydride in pyridine gave 1',2'-di-O-acetyl-N'-(N,N-dimethylaminomethylene)-L-biopterin (4), which was converted by the Mitsunobu reaction into 3 ...
Hanaya Tadashi +5 more
doaj +1 more source
Pteridines, 2003 Cerebrospinal fluid (CSF) neopterin been previously reported in various diseases. In this study CSF neopterin, biopterin, and nitrite/nitrate (NOx) Contents were measured and the correlation between them in child patients with various kinds of ...
Kawakami Yasuhiko +11 more
doaj +1 more source
Pteridines, 1997 Based on the hypothesis that catecholamine decreases may cause increases in biopterin, we measured the GTP cyclohydrolase I(GTPCH-I) activity and biopterin content in the cerebral cortex, midbrain/diencephalon, cerebeilum, pons/medulla oblongata ...
Sakamoto Hideo +2 more
doaj +1 more source