Results 81 to 90 of about 2,236 (202)
Mechanistic Study of ROS-photogeneration by Pterin
Pteridines, 2011 Pterins are widespread in biological systems and possess photosensitizing activities. In the present study, the photosensitization mechanism of acid form of pterin (PTA) and basic form of pterin (PTB) is investigated by means of density functional theory
Ji Hong-Fang, Shen Liang
doaj +1 more source
A contribution to the chemistry of pterins [PDF]
Proceedings of the Royal Society of London. Series B - Biological Sciences, 1942 Abstract The experiments in this paper have been chiefly concerned with a derivative from pterins, the wing pigments of pierid butterflies. These pigments have become prominent of recent years, partly on account of the prolonged efforts (1925-41) of continental workers to determine their nature.
openaire +1 more source
, 2019 Additional file 3: Figure S2. Typical chromatograms of the different metabolites analysed in non-spiked CSF samples: (1) Amino acids. (2) Biogenic amines. (3) Pterins. (4) 5-methyltetrahydrofolate. (5) Pyridoxal 5´-phosphate.
Maria del Carmen Salgado (7867985) +10 more
core +1 more source
Pteridines, 2002 Neopterin, 7,8-dihydroneopterin and 5,6,7,8-terahydroneopterm are secreted by human macrophages after activation by interferon-γ. The biological stability of the reduced pterins is less than one hour and therefore distinctly lower than that of neopterin.
Horejsi Renate +3 more
doaj +1 more source
eLife, 2017 Nonribosomal peptides represent a large class of metabolites with pharmaceutical relevance. Pteridines, such as pterins, folates, and flavins, are heterocyclic metabolites that often serve as redox-active cofactors.
Hyun Bong Park +4 more
doaj +1 more source
Theoretical study on the relative energies of cationic pterin tautomers
Pteridines, 2015 Pterins are heterocyclic molecules of biological importance that contain several basic sites. These molecules can be protonated in aqueous solution resulting in a wide variety of structures that differ in their site of protonation and tautomeric form. In
Nekkanti Sindhura, Martin Christopher B.
doaj +1 more source
Electron-transfer processes induced by the triplet state of pterins in aqueous solutions [PDF]
, 2010 Pterins (Pt) are heterocyclic compounds widespread in living systems. They participate in relevant biological processes, such as metabolic redox reactions, and can photoinduce the oxidation of biomolecules through electron transfer mechanisms.
Thomas, Andrés Héctor +13 more
core +1 more source
Tissue Expression Of The 6-Pyruvoyi Tetrahydropterin Synthase Gene In Adult Zebrafish,Danio Rerio. [PDF]
, 2004 Teleost is one of the poikilotherms that can display different kind of colours on their body. This is due to the presence of different types of chromatophores, a group of pigment containing cells that is distributed in the epidermal layer of skin and ...
Tengku Muhammad, Tengku Sifzizul +3 more
core +1 more source
Pteridines, 1990 A novel and sensitive enzyme immunoassay for neopterin and biopterin using a microtitre plate has been developed. The antiserum against neopterin or biopterin was incubated with samples prepared from human urine or rat tissues, and was placed in a well ...
Sugimoto Takashi +6 more
doaj +1 more source
Intracranial calcification in dihydropteridine reductase deficiency
The Turkish Journal of Pediatrics, 1990 We described the clinical status and computerized tomographic findings of two patients with tetrahydrobiopterin (BH4) deficiency due to impaired BH4 regeneration.
T Coşkun, A Besim, I Ozalp, M Eryilmaz
doaj