Results 11 to 20 of about 10,444 (253)

Pigments, Chromatophore Structure, and Gene Expression Underlying Colour Polytypy of a Panamanian Poison Frog. [PDF]

Mol Ecol
ABSTRACT Colour polytypism represents an example of phenotypic diversification shaped by genetic divergence and ecological pressures. Poison frogs of the genus Oophaga (Dendrobatidae) are highly polytypic in coloration, making them an ideal system for investigating the genetic and physiological basis of colour variation.
Mantzana-Oikonomaki V, Tamayo-Castillo G, Vásquez-Cháves V, Mora-Machado A, Zamora Ramirez WJ, Ibáñez R, Pröhl H, Rodríguez A.   +7 more
europepmc   +2 more sources

An Allele of Glutamate Formiminotransferase Triggers 5-Methyl-Tetrahydrofolate-to-MeFox Conversion and Facilitates Folate Biofortification in Maize. [PDF]

Adv Sci (Weinh)
This work demonstrates the distinct roles of the glutamate formiminotransferase (GFT) enzyme in plants. The GFT triggers the conversion of 5‐methyl‐tetrahydrofolate to MeFox in plants, a process distinct from its role as a formiminotransferase in mammals.
Lian T, Guo W, Wang Y, Wen W, Wang W, Jiang L, Liang Q, Liu J, Liu H, Xue Y, Pan L, Liu Q, Yin P, Zhang D, Yan J, Zhang C.   +15 more
europepmc   +2 more sources

Antitumor studies. Part 4: Design, synthesis, antitumor activity, and molecular docking study of novel 2-substituted 2-deoxoflavin-5-oxides, 2-deoxoalloxazine-5-oxides, and their 5-deaza analogs [PDF]

, 2008
Various novel 10-alkyl-2-deoxo-2-methylthioflavin-5-oxides and their 2-alkylamino derivatives were prepared by facile nitrosative cyclization of 6-(N-alkylanilino)-2-methylthiopyrimidin-4(3H)-ones followed by nucleophilic replacement of the 2-methylthio ...
Ali, Hamed I., Ashida, Noriyuki, Nagamatsu, Tomohisa   +2 more
core   +1 more source

Crystal structure of (2-amino-7-methyl-4-oxidopteridine-6-carboxylato-κ3O4,N5,O6)aqua(1,10-phenanthroline-κ2N,N′)zinc trihydrate

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, [Zn(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 coordination ...
Siddhartha S. Baisya, Baidyanath Ghosh, Parag S. Roy   +2 more
doaj   +1 more source

Urinary pteridines as a discriminator of atherosclerotic risk in patients with diabetes

Atherosclerosis Plus, 2021
Background and aims: We have recently proposed urinary pteridine level as a useful biomarker of oxidative stress in a general population. However, the significance of urinary pteridines in patients with diabetes is unknown.
Mikio Marumo, Kazumi Ekawa, Ichiro Wakabayashi   +2 more
doaj   +1 more source

Series of Microporous Redox-Active Pillared Metal-Organic Frameworks Based On Alloxazine Ligands. [PDF]

ChemistryOpen
Two series of robust pillared metal–organic frameworks using a redoactive ligand based on alloxazine and transition metals have been evidenced by XRD. The compounds have high decomposition temperatures, and their sorption properties are measured, revealing relatively low surface areas and a moderate uptake of CO2 and C2H4 at high pressures.
Casas J, Vicatos AI, Barbour LJ, Kyritsakas N, Jouaiti A, Ferlay S.   +5 more
europepmc   +2 more sources

ITRAQ Proteomic Analysis of Yellow and Black Skin in Jinbian Carp (Cyprinus carpio)

Life, 2020
Colors are important phenotypic traits for fitness under natural conditions in vertebrates. Previous studies have reported several functional genes and genetic variations of pigmentation, but the formation mechanisms of various skin coloration remained ...
Xiangchen Ye, Lingling Zhou, Jingyi Jia, Lingjing Wei, Yanhong Wen, Xueyu Yan, Jie Huang, Baojiang Gan, Kang Liu, Yejian Lv, Guangfu Hu   +10 more
doaj   +1 more source

Chroman-4-One Derivatives Targeting Pteridine Reductase 1 and Showing Anti-Parasitic Activity [PDF]

, 2017
Flavonoids have previously been identified as antiparasitic agents and pteridine reductase 1 (PTR1) inhibitors. Herein, we focus our attention on the chroman-4-one scaffold.
Alcantara, Laura M, Behrens, Birte, Borsari, Chiara, Cordeiro-da-Silva, Anabela, Costi, Maria Paola, Dello Iacono, Lucia, Di Pisa, Flavio, Ferrari, Stefania, Fontana, Vanessa, Freitas-Junior, Lucio H, Gul, Sheraz, Kuzikov, Maria, Landi, Giacomo, Mangani, Stefano, Moraes, Carolina B, Poehner, Ina, Pozzi, Cecilia, Santarem, Nuno, Santucci, Matteo, Wade, Rebecca C   +19 more
core   +3 more sources

The Sequence of Mouse Dihydropteridine Reductase cDNA, and Comparison with Human and Rat Sequences

Pteridines, 1996
A mouse liver eDNA library in λZAP was screened using a 627 bp portion of 32p randomly labeled human dihydropteridine reductase (731 bp) cDNA and seven positive clones were obtained.
Yang Nan, Hanssen Kevin, Armarego Wilfred L.F.   +2 more
doaj   +1 more source

Adsorption and Vibrational Study of Folic Acid on Gold Nanopillar Structures Using Surface-enhanced Raman Scattering Spectroscopy [PDF]

, 2015
This paper presents a study of adsorption and vibrational features of folic acid, using surface-enhanced Raman scattering (SERS). A gold-capped silicon nanopillar (Au NP) with a height of 600 nm and a width of 120 nm was utilized to study the vibrational
Boisen, Anja, Castillo, John J., Rindzevicius, Tomas, Rozo, Ciro E.   +3 more
core   +3 more sources