Results 71 to 80 of about 4,377 (174)

(2-Amino-7-methyl-4-oxidopteridine-6-carboxylato-κ3O4,N5,O6)aqua(1,10-phenanthroline-κ2N,N′)cobalt(II) trihydrate

Acta Crystallographica Section E, 2013
In the title compound, [Co(C8H5N5O3)(C12H8N2)(H2O)]·3H2O, a tridentate 2-amino-7-methyl-4-oxidopteridine-6-carboxylate ligand, a bidentate ancillary 1,10-phenanthroline (phen) ligand and a water molecule complete a distorted octahedral geometry ...
Siddhartha S. Baisya, Samir Sen, Parag S. Roy   +2 more
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

Novel Synthesis of 8-Deaza-5,6,7,8-tetrahydroaminopterin Analogues via an Aziridine Intermediate

Molecules, 2012
An efficient method for the construction of the tetrahydrofolate skeleton is described. Starting from pterin analogues and aromatic amines, 8-deaza-5,6,7,8-tetrahydroaminopterin derivatives and the heterocyclic benzoyl isosteres were synthesized via a ...
Zhili Zhang, Chao Li, Ying Guo, Junyi Liu, Xiaowei Wang, Chao Tian, Shouxin Zhou   +6 more
doaj   +1 more source

Folic Acid With Fluorene: A Complexation Study by UV and FTIR Spectroscopies

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2017
The complexation between folic acid and a typical polyaromatic hydrocarbon, fluorene, was investigated using FTIR and UV spectra. Appearance of a new IR band at 2401cm−1 demonstrates that NH2–C=N moiety on pterin ring in folic acid is protonated ...
K. K. Hammud, M. M. Mohammed, L. M. Abdul Raouf, S. S. Ibrahim, D. E. Znad   +4 more
doaj  

Photosensitization of peptides and proteins by pterin derivatives

Pteridines, 2017
Proteins are one of the preferential targets of the photosensitized damaging effects of ultraviolet (UV) radiation on biological system. Pterins belong to a family of heterocyclic compounds, which are widespread in living systems and participate in ...
Dantola Maria Laura, Reid Lara O., Castaño Carolina, Lorente Carolina, Oliveros Esther, Thomas Andrés H.   +5 more
doaj   +1 more source

PTERINE OXIDASE

Journal of Biological Chemistry, 1949
O H, LOWRY, O A, BESSEY, E J, CRAWFORD
openaire   +2 more sources

Tetrahydrobiopterin and inherited hyperphenylalaninemias

The Turkish Journal of Pediatrics, 1996
Tetrahydrobiopterin deficiency, a variant of hyperphenylalaninemia, may be caused by deficiency of one of the following enzymes: guanosine triphosphate cyclohydrolase 1,6-pyruvoyltetrahydropterin synthase, dihydropteridin reductase and pterin-4a ...
N Blau, B Thony, M Spada, A Ponzone
doaj  

Triphenyltin induced darker body coloration by disrupting melanocortin system and pteridine metabolic pathway in a reef fish, Amphiprion ocellaris

Ecotoxicology and Environmental Safety
Triphenyltin (TPT) is a typical persistent organic pollutant whose occurrence in coral reef ecosystems may threaten the survival of reef fishes. In this study, a brightly colored representative reef fish, Amphiprion ocellaris was used to explore the ...
Song Liu, Yu Hou, Ya-jun Shi, Nan Zhang, Yi-guang Hu, Wen-ming Chen, Ji-liang Zhang   +6 more
doaj   +1 more source

Influence of pteridines and statins on cancer: A therapeutic strategy targeting nitric oxide synthase (NOS) pathway

Advances in Redox Research
A family of enzymes known as nitric oxide synthases (NOS) produces nitric oxide (NO), a tiny, unstable, and potentially hazardous gas that is highly diffusible across cell membranes.
Jerimon Johnson, Monisha Krishnan, Sasireka Manikandan, Nivetha Shanmuganathan, Martinahingis Kennedy, Kris Santhiya Yeasuraj, Sridhar Muthusami, Angayarkanni Jayaraman   +7 more
doaj   +1 more source

Emerging roles of pterins as signaling molecules in bacteria. [PDF]

Biochem Soc Trans
Rucker P, Augusta L, Fuqua C, Allen KD.
europepmc   +1 more source