Results 31 to 40 of about 9,547 (224)
Pteridines, 2018 A concise account of pterins in chemistry and biology and their applications in molecular sensors including their optical spectroscopic properties are described.
Goswami Shyamaprosad +3 more
doaj +1 more source
The key role of nitric oxide in hypoxia: hypoxic vasodilation and energy supply-demand matching [PDF]
, 2013 Significance: a mismatch between energy supply and demand induces tissue hypoxia with the potential to cause cell death and organ failure. Whenever arterial oxygen concentration is reduced, increases in blood flow - 'hypoxic vasodilation' - occur in an ...
Alex Dyson +23 more
core +1 more source
Tryptophan oxidation photosensitized by pterin
Free Radical Biology and Medicine, 2013 Pterins are normal components of cells and they have been previously identified as good photosensitizers under UV-A irradiation, inducing DNA damage and oxidation of nucleotides. In this work, we have investigated the ability of pterin (Ptr), the parent compound of oxidized pterins, to photosensitize the oxidation of another class of biomolecules ...
Thomas, Andrés +6 more
openaire +4 more sources
7‐Substituted pterins in humans with suspected pterin‐4a‐carbinolamine dehydratase deficiency [PDF]
European Journal of Biochemistry, 1992 A recently described new form of hyperphenylalaninemia is characterized by the excretion of 7‐substituted isomers of biopterin and neopterin and 7‐oxo‐biopterin in the urine of patients. It has been shown that the 7‐substituted isomers of biopterin and neopterin derive from L‐tetrahydrobiopterin and D‐tetrahydroneopterin and are formed during ...
Adler, Carmen +7 more
openaire +3 more sources
Measuring and modelling optical scattering and the colour quality of white pierid butterfly scales [PDF]
, 2013 Copyright © 2009 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA.
Hallam, B. T. +2 more
core +1 more source
Inhibitory Effects of Pteridines on the Cytochrome P-450 Enzyme System
Pteridines, 1997 The effects of 17 different pteridine derivatives on rat liver microsomal cytochrome P-450 catalyzed degradation of aminoantipyrin were studied.
Horejsi Renate +5 more
doaj +1 more source
Synthesis of 6-Hydroxymethylpterin α- and β-D-Glucosides [PDF]
, 2010 The key precursor, N(2)-(N,N-dimethylaminomethylene)-6-hydroxymethyl-3-[2-(4-nitrophenyl)ethyl]pterin (11) was efficiently prepared from 2,5,6-triamino-4-hydroxypyrimidine (8) in 5 steps.
Baba, Hiroki +3 more
core +1 more source
Molecular architecture of pterin deaminase from Saccharomyces cerevisiae NCIM 3458
Pteridines, 2017 As early as 1974, reports have confirmed the anticancer activity of pterin deaminase isolated from fungi. The enzyme has also been reported in bacteria, fungi and slime mold genera, but the enzyme characterization was effetely done.
Murugesan Thandeeswaran +7 more
doaj +1 more source
Exploring the scope of DBU-promoted amidations of 7-carboxymethyl-pterin [PDF]
, 2020 Pteridines are an important heterocycle often used in the development of pharmaceutically relevant compounds, and in the field of supramolecular chemistry.
Bockman, Anna
core +1 more source
Plasma Levels of Neopterin and Biopterin in the Umbilical Vessels and the Maternal Vein
Pteridines, 2003 Tetrahydrobiopterin (BH4) is a highly bioactive pterin required for nitric oxide synthase and monooxygenases of aromatic amino acids, and is involved in the synthesis of nitric oxide, catecholamines and Serotonin.
Iwanaga Naoko +8 more
doaj +1 more source