Results 11 to 20 of about 196 (49)

Evaluation of Serum and Urinary Levels of some Pteridine Pathway Components in Healthy Turkish Children

open access: yesPteridines, 2012
Neopterin, as a non-conjugated pteridine, is synthesized from guanosine triphosphate and its production is upregulated upon the activation of cellular immune response.
Girgin Gözde   +5 more
doaj   +1 more source

Glyceryl-Ether Monooxygenase [EC 1.14.16.5J Part VIII. Probing the Nature of the Active Site

open access: yesPteridines, 1995
The V /K kinetic parameters for glyceryl-ether monooxygenase with 3-1 '-n-alkoxypropane-I,2-diols having alkyl sidechains varying from Cll to C22 (lb-k, 2a and b, and 3d) were determined. Maximum activity was found with the CI6 ethers, dropping almost to
Taguchi Hiroyasu   +2 more
doaj   +1 more source

Difference of DNA Compaction Performed by Two kinds of Oncopterin-Mimic Pteridine - Polyamine Conjugates

open access: yesPteridines, 2006
Two types of pteridine - polyamine conjugates designed on oncopterin perform different actions to DNA. The most obvious difference is their actions in DNA compaction. One of the pteridine - polyamine conjugates, PT- 2R, containing a polyamine substituent
Murata Shizuaki, Chen Ning
doaj   +1 more source

Age-dependance of pteridines in the malaria vector, Anopheles stephensi

open access: yesPteridines, 2017
Determining the accurate age of malaria vectors is crucial to measure the risk of malaria transmission. A group of fluorescent chemicals derived from a pyrimidine-pyrazine ring structure known as pteridines from the head, thorax and whole body of adult ...
Edalat Hamideh   +2 more
doaj   +1 more source

A Simple and Convenient Method for the Synthesis of 1-Methyl-7-arylfuro[3,2-g]pteridine-2,4(1H,3H)-diones and Their Substituted Derivatives

open access: yesActa Chimica Slovenica, 2020
A simple and effective method for the synthesis of unknown 1-methyl-7-arylfuro[3,2-g]pteridine-2,4(1H,3H)-diones by dehydration of the corresponding 1-methyl-6-phenacyl-pteridine-2,4,7(1H,3H,8H)-triones is reported in the article. It was shown that their
Maxim Stanislavovich Kazunin   +4 more
doaj   +1 more source

Pteridine levels and head weights are correlated with age and colony task in the honey bee, Apis mellifera [PDF]

open access: yesPeerJ, 2016
Background. The age of an insect strongly influences many aspects of behavior and reproduction. The interaction of age and behavior is epitomized in the temporal polyethism of honey bees in which young adult bees perform nurse and maintenance duties ...
Frank D. Rinkevich   +4 more
doaj   +2 more sources

Inhibitory Effects of Pteridines on the Cytochrome P-450 Enzyme System

open access: yesPteridines, 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

In Silico and In Vitro Search for Dual Inhibitors of the Trypanosoma brucei and Leishmania major Pteridine Reductase 1 and Dihydrofolate Reductase

open access: yesMolecules, 2023
The parasites Trypanosoma brucei (Tb) and Leishmania major (Lm) cause the tropical diseases sleeping sickness, nagana, and cutaneous leishmaniasis. Every year, millions of humans, as well as animals, living in tropical to subtropical climates fall victim
Katharina Possart   +3 more
doaj   +1 more source

Localization of Sepiapterin Deaminase and Pteridines In the Granules In Epidermal Cells of the Silkworm, Bombyx mori

open access: yesPteridines, 1990
A new method for assay of sepiapterin deaminase (3.5.4.24) activity by use of high performance liquid chromatography (HPLC) was developed. By this sensitive method the enzyme activity in the cell organelle was assayed.
Tsusué M., Kuroda S., Sawada H.
doaj   +1 more source

Occurrence and significance of folic acid

open access: yesPteridines, 2018
Folic acid is a naturally occurring pteridine, which was originally isolated from plants. Folic acid (pteroyl-glutamic acid) is composed of pteridine (6-methylptero), p-aminobenzoic acid (PABA) and glutamic acid.
Cieślik Ewa, Cieślik Iwona
doaj   +1 more source

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