Results 41 to 50 of about 7,557 (234)

Exploring the scope of DBU-promoted amidations of 7-methoxycarbonylpterin

Beilstein Journal of Organic Chemistry, 2020
The synthetic utility of pterins is often hampered by the notorious insolubility of this heterocycle, slowing the development of medicinally relevant pteridine derivatives.
Anna R. Bockman, Jeffrey M. Pruet
doaj   +1 more source

Theoretical determination of two-photon absorption in biologically relevant pterin derivatives

Photochemical and Photobiological Sciences, 2020
Given the prevalence of fluorescence spectroscopy in biological systems, and the prevalence of pterin derivatives throughout biological systems, presented here is an assessment of the two-photon absorption spectroscopy as it applies to a range of the ...
Thomas Malcomson, M. Paterson
semanticscholar   +1 more source

Enzymatic and Mutational Analysis of the PruA Pteridine Reductase Required for Pterin-Dependent Control of Biofilm Formation in Agrobacterium tumefaciens

Journal of Bacteriology, 2020
Biofilms are complex multicellular communities that are formed by diverse bacteria. In the plant pathogen Agrobacterium tumefaciens, the transition from a free-living motile state to a nonmotile biofilm state is governed by a novel signaling pathway ...
Monica Labine, Lisa DePledge, Nathan Feirer, Jennifer L. Greenwich, C. Fuqua, Kylie D. Allen   +5 more
semanticscholar   +1 more source

(2-Amino-7-methyl-4-oxidopteridine-6-carboxylato-κ3O4,N5,O6)(ethane-1,2-diamine-κ2N,N′)(1H-imidazole-κN3)nickel(II) dihydrate

Acta Crystallographica Section E, 2013
In the title complex, [Ni(C8H5N5O3)(C2H8N2)(C3N2H4)]·2H2O, a tridentate 2-amino-7-methyl-4-oxidopteridine-6-carboxylate (pterin) ligand, a bidentate ancillary ethane-1,2-diamine (en) ligand and a monodentate 1H-imidazole (im) ligand complete a ...
Siddhartha S. Baisya, Parag S. Roy
doaj   +1 more source

Biotransformation of Sulfonamide Antibiotics in Activated Sludge: The Formation of Pterin-Conjugates Leads to Sustained Risk.

Environmental Science and Technology, 2018
The presence of antibiotics in treated wastewater and consequently in surface and groundwater resources raises concerns about the formation and spread of antibiotic resistance. Improving the removal of antibiotics during wastewater treatment therefore is
Stefan Achermann, V. Bianco, Cresten B. Mansfeldt, Bernadette Vogler, B. Kolvenbach, P. Corvini, K. Fenner   +6 more
semanticscholar   +1 more source

(2-Amino-7-methyl-4-oxidopteridine-6-carboxylato-κ3O4,N5,O6)aqua(ethane-1,2-diamine-κ2N,N′)nickel(II) dihydrate

Acta Crystallographica Section E, 2013
The NiII atom in the title complex, [Ni(C8H5N5O3)(C2H8N2)(H2O)]·2H2O, is six-coordinated in a distorted octahedral geometry by a tridentate 2-amino-7-methyl-4-oxidopteridine-6-carboxylate (pterin) ligand, a bidentate ancillary ethane-1,2-diamine (en)
Siddhartha S. Baisya, Parag S. Roy
doaj   +1 more source

A concise treatment of pterins: some recent synthetic and methodology aspects and their applications in molecular sensors

Pteridines, 2018
A concise account of pterins in chemistry and biology and their applications in molecular sensors including their optical spectroscopic properties are described.
Goswami Shyamaprosad, Das Manas Kumar, Sain Dibyendu, Goswami Bhaswati   +3 more
doaj   +1 more source

Pterin-pigmented nanospheres create the colours of the polymorphic damselfly Ischnura elegans

Journal of the Royal Society Interface, 2019
Animal colours commonly act as signals for mates or predators. In many damselfly species, both sexes go through a developmental colour change as adults, and females often show colour polymorphism, which may have a function in mate choice, avoidance of ...
M. J. Henze, O. Lind, B. Wilts, A. Kelber   +3 more
semanticscholar   +1 more source

Theoretical Study on the Relative Energies of Neutral Pterin Tautomers

Pteridines, 2008
Current literature lists the lactam and lactim tautomers as the only major contributors to aqueous pterin structures. Density functional theory calculations were used to determine whether there are other significant neutral tautomers of pterin ...
Soniat Michael, Martin Christopher B.
doaj   +1 more source

Immunopterin: A prospective therapy and preventative to fight COVID-19?

Pteridines, 2022
The authors explore the therapeutic and prophylactic efficacies of Immunopterin (calcium pterin-6-carboxylate chelate) against coronavirus colds and as a therapy against COVID-19.
Moheno Phillip B. B., Fuchs Dietmar
doaj   +1 more source