Results 71 to 80 of about 9,547 (224)
Probing the heme-thiolate oxygenase domain of inducible nitric oxide synthase with Ru(II) and Re(I) electron tunneling wires [PDF]
, 2008 Nitric oxide synthase (NOS) catalyzes the production of nitric oxide from L-arginine and dioxygen at a thiolate-ligated heme active site. Although many of the reaction intermediates are as yet unidentified, it is well established that the catalytic cycle
Belliston-Bittner, Wendy +4 more
core +1 more source
The active site structure and catalytic mechanism of arsenite oxidase [PDF]
, 2017 Arsenite oxidase is thought to be an ancient enzyme, originating before the divergence of the Archaea and the Bacteria. We have investigated the nature of the molybdenum active site of the arsenite oxidase from the Alphaproteobacterium Rhizobium sp. str.
Cotelesage, JJH +4 more
core +1 more source
New Zealand Journal of Botany, Volume 64, Issue 1, March 2026.Central Asia harbors a rich yet understudied assemblage of wood‐inhabiting Hymenochaetoid fungi. This review delivers the first comprehensive synthesis of 43 poroid species representing 18 genera documented across montane forests, steppes, and xeric habitats.
Yusufjon Gafforov +16 more
wiley +1 more source
Biomimetic Pieris rapae’s Nanostructure and Its Use as a Simple Sucrose Sensor
Micromachines, 2014 Biomimetics often provides efficient ways to create a product incorporating novel properties. Here we present the replication of the Pieris rapae butterfly optical structure. This butterfly has white wings with black spots.
David Bonzon +3 more
doaj +1 more source
Fundamental Molecules of Life are Pigments which Arose and Evolved to Dissipate the Solar Spectrum
, 2014 The driving force behind the origin and evolution of life has been the thermodynamic imperative of increasing the entropy production of the biosphere through increasing the global solar photon dissipation rate.
Michaelian, Karo, Simeonov, Aleksandar
core +2 more sources
An Efficient Synthesis of 2'-O-(β-D-Ribofuranosyl)biopterin [PDF]
, 2008 N(2)-(N,N-Dimethylaminomethylene)-3-[2-(4-nitrophenyl)ethyl]-1',2'-di-O (trimethylsilyl)biopterin (4) was prepared from biopterin (1a, 86% overall yield) in 5 steps. Glycosylation of 4 with 1,2,3,5-tetra-O-acetyl-β D-ribofuranose (5a) and its 2,3,5-tri-O-
Fujita, Hiroshi +5 more
core +1 more source
The Journal of Clinical Pharmacology, Volume 66, Issue 1, January 2026.Abstract Sepiapterin and its major metabolite 6R‐L‐erythro‐5,6,7,8‐tetrahydrobiopterin (BH4) bind to distinct variants of phenylalanine hydroxylase (PAH), which converts excess phenylalanine to tyrosine, thereby stabilizing, enhancing, and prolonging PAH activity.
Lan Gao +7 more
wiley +1 more source
Pteridines, 1998 Ab initio quantum chemical computations at the Hartree-Fock 6-31g** level of theory were performed on pterin, 7,8-dihydropterin and 5,6,7,8 -tetrahydropterin.
Reibnegger Gilbert +3 more
doaj +1 more source
Diagnosis of tetrahydrobiopterin deficiency using filter paper blood spots: further development of the method and 5 years experience [PDF]
, 2018 In every newborn with even mild hyperphenylalaninemia (HPA) tetrahydrobiopterin (BH4) deficiencies need to be excluded as soon as possible. Differential diagnosis is most commonly performed by analysis of urinary neopterin and biopterin.
Abu Seda, Bettina +5 more
core
Molecular Ecology, Volume 35, Issue 1, January 2026.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.
Vasiliki Mantzana‐Oikonomaki +7 more
wiley +1 more source