Results 81 to 90 of about 9,956 (243)

Synthesis, structure and photophysical properties of novel thiazolo[2,3-b]pteridines

Acta Chimica Slovenica
A one-pot synthesis of a series of thiazolo[2,3-b]pteridines, along with an alternative step-by-step procedure, has been developed. The regioselectivity of the heterocyclization was determined using a combination of physicochemical methods, including X ...
Daryna Kyrylova, Oleksii Voskoboinik, Anatolii Tatarets, Liubomyr Havryshchuk, Svitlana Shishkina, Sergiy Okovytyy, Serhii Kovalenko   +6 more
doaj   +1 more source

6-Acetonylisoxanthopterin: A Potent Inhibitor of Sepiapterin Reductase

Pteridines, 1991
The inhibitory effect of 6-/7-substituted (2'-oxo) pteridines and ichthyopterin was examined for sepiapterin reductase. 6-Acetonylisoxanthopterin and 6-acetonyl-2,4-diamino-7-hydroxypteridine showed pronounced competitive inhibitory effects to ...
Nakanishi A., Goto M., Katoh S., Sueoka T.   +3 more
doaj   +1 more source

An in vitro System for Studying Pteridine Biosynthesis In Drosophila melanogaster

Pteridines, 1991
In vitro organ culture is a system especially useful for the study of metabolic pathways and their regulation. This report applies such a system to the study of the biosynthesis of pteridines in Drosophila melanogaster, determining in vitro optimal ...
Escriche B., Silva F. J.
doaj   +1 more source

Purification and Characterization of Sepiapterin Deaminase from the Silkworm, Bombyx mori

Pteridines, 1998
Sepiapterin deaminase has been purified approximately 6,000-told from the larval integument of the lemon mutant of the silkworm by several column chromatographic procedures.
Sawada Hiroshi, Kanekatsu Motoki, Nakagoshi Motoko, Dohke Kenjiro, Iino Teruhiko, Takikawa Shin-Ichiro   +5 more
doaj   +1 more source

Highly regioselective 6-exo-dig iodo/bromo cyclizations of functionalized 5-amino propargyl pyrimidinones: an efficient synthesis of functionalized pteridines. [PDF]

RSC Adv, 2023
Naikoo RA, Kumar R, Sharma R, Mahajan D, Bhargava G.   +4 more
europepmc   +1 more source

Pteridines XCVIII. Synthesis and Properties of 1-Methylpterins

Pteridines, 1993
A series of 1-methyl-pterin derivatives (6-13) have been synthesized by condensation and methylation reactions. The compounds have been characterized by elemental analyses, pKa deterimations and UV spectra.
Pfleiderer Wolfgang
doaj   +1 more source

Pteridines CII Synthesis and Characterization of Dimeric Lumazines

Pteridines, 1994
Reduction of 1.3-dimethyllumazine (1) by zinc dust in Ac2O/AcOH leads to the formation of 6-7 connected bis-Iumazinyl derivatives. Depending on the reaction conditions either 7 -(5-acetyl-5,6, 7,8-tetrahydro-1.3-dimethyllumazin- 6-yl)-l, 3 ...
Koul Ashok, Wagner Thomas, Pfleiderer Wolfgang   +2 more
doaj   +1 more source

Changes in FeNO, d-ROMs, and BH4 by Intravenous L-Arginine in Children and Its Putative Role in Asthma Treatment

Journal of Asthma and Allergy
Naho Yamamoto,1 Saki Kasuga,1 Daijiro Kabata,2 Myu Ono,1 Sakura Ando,1 Taisuke Hashimoto,1 Shiori Fujikawa,1 Hiroko Fujitani,3 Ayumi Shintani,2 Takashi Hamazaki1 1Department of Pediatrics, Osaka Metropolitan University Graduate School of Medicine, Osaka,
Yamamoto N, Kasuga S, Kabata D, Ono M, Ando S, Hashimoto T, Fujikawa S, Fujitani H, Shintani A, Hamazaki T   +9 more
doaj  

PTERIDINES IN PHOTOSYNTHESIS [PDF]

Proceedings of the National Academy of Sciences, 1958
R C, Fuller, I C, Anderson, H A, Nathan
openaire   +2 more sources

Synthesis of 6β-N(5)-Methyl-5,6,7,8-tetrahydro-L-biopterin [PDF]

, 2017
Summary 6β-N(5)-methyl-5.6J,8-tetrahydro-L-biopterin·2 HC1. a new derivate of biological interest, was synthesized from 6β-5,6,7,8-tetrahydro-L-biopteril·2 HC1 and characterized.
Bosshard, Rene, Heizmann, Claus W., Viscontini, Max   +2 more
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