Results 71 to 80 of about 2,270,919 (288)

Protonophore activity of short‐chain fatty acids induces their intracellular accumulation and acidification

open access: yesFEBS Letters, EarlyView.
The protonated form of butyrate, as well as other short‐chain fatty acids (SCFAs), is membrane permeable. In acidic extracellular environments, this can lead to intracellular accumulation of SCFAs and cytosolic acidification. This phenomenon will be particularly relevant in acidic environments such as the large intestine or tumor microenvironments ...
Muwei Jiang   +2 more
wiley   +1 more source

Description du développement de la politique de santé numérique tchadienne [PDF]

open access: yesPensées Genre, Penser Autrement
Le développement de la politique de santé numérique recèle un potentiel considérable d’amélioration concernant les soins de santé et la vie des utilisateurs.
ALBASSAR Tiguetna Esaïe   +1 more
doaj   +1 more source

A stepwise emergence of evolution in the RNA world

open access: yesFEBS Letters, EarlyView.
How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley   +1 more source

Ces Espaces autres entre rôles et enjeux : des espaces topiques aux espaces hétérotopiques dans La Chrysalide et Ciel de Porphyre d’Aicha Lemsine [PDF]

open access: yesRevue Roumaine d’Etudes Francophones, 2020
Space represents an indispensable element in the progression of the narrative, and it is linked to the being and the becoming of the characters. It is also the reflection of their deep structure because the spaces, the places described and the intimate ...
Sihem GUETTAFI
doaj  

DESCRIPTIVE CHEMISTRY. [PDF]

open access: yesJournal of the American Chemical Society, 1903
n ...
openaire   +2 more sources

Modifications in FLAP's second cytosolic loop influence 5‐LOX interaction, inhibitor binding, and leukotriene formation

open access: yesFEBS Letters, EarlyView.
The enzyme 5‐lipoxygenase (5‐LOX) catalyzes the first step in the biosynthesis of leukotrienes (LTs) involved in inflammatory pathophysiology. After cellular stimulation, 5‐LOX translocates to the nucleus, interacting with the 5‐LOX‐activating protein (FLAP) to form LTA4 from arachidonic acid (AA).
Erik Romp   +5 more
wiley   +1 more source

Global modeling of tropospheric chemistry with assimilated meteorology : Model description and evaluation

open access: yes, 2001
We present a first description and evaluation of GEOS-CHEM, a global three- dimensional (3-D) model of tropospheric chemistry driven by assimilated meteorological observations from the Goddard Earth Observing System (GEOS) of the NASA Data Assimilation ...
I. Bey   +9 more
semanticscholar   +1 more source

HGVS Recommendations for the Description of Sequence Variants: 2016 Update

open access: yesHuman Mutation, 2016
The consistent and unambiguous description of sequence variants is essential to report and exchange information on the analysis of a genome. In particular, DNA diagnostics critically depends on accurate and standardized description and sharing of the ...
J. T. Dunnen   +9 more
semanticscholar   +1 more source

The carboxylate “gripper” of the substrate is critical for C‐4 stereo‐inversion by UDP‐glucuronic acid 4‐epimerase

open access: yesFEBS Letters, EarlyView.
UDP‐glucuronic acid 4‐epimerase (UGAepi) catalyzes NAD+‐dependent interconversion of UDP‐glucuronic acid (UDP‐GlcA) and UDP‐galacturonic acid (UDP‐GalA) via C4‐oxidation, 4‐keto‐intermediate rotation, and C4‐reduction. Here, Borg et al. examined the role of the substrate's carboxylate group in the enzymic mechanism by analyzing NADH‐dependent reduction
Annika J. E. Borg   +2 more
wiley   +1 more source

The Human Connectome: A Structural Description of the Human Brain

open access: yesPLoS Comput. Biol., 2005
The connection matrix of the human brain (the human “connectome”) represents an indispensable foundation for basic and applied neurobiological research.
O. Sporns, G. Tononi, R. Kötter
semanticscholar   +1 more source

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