Results 31 to 40 of about 4,820,720 (296)

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

Modelling the Present-Day Oceanic Carbon Cycle

open access: yes, 1993
Carbon dioxide is an important greenhouse gas, and its atmospheric increase causes concern because of a potential impact on the global climate. A prerequisite for assessing possible future climatic changes is a means to estimate the future development of
Ulrich Siegenthaler   +1 more
core   +1 more source

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

open access: yesFEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil   +3 more
wiley   +1 more source

Spatial differentiation characteristics and controlling factors of the epikarst thickness in Southwest China

open access: yesGeoderma
The epikarst, a critical link between surface and subsurface in karst regions, plays a vital role in regulating groundwater cycle, sustaining biogeochemical cycles, and securing water resources.
Jinke Chen   +12 more
doaj   +1 more source

Remote sensing of young leaf photosynthetic capacity in tropical and subtropical evergreen broadleaved forests [PDF]

open access: yesEarth System Science Data
Determining the large-scale RuBisCO carboxylation maximum rate (Vc,max25) in relation to leaf age is essential for evaluating the photosynthetic capacity of canopy leaves in global forests.
X. Yang   +12 more
doaj   +1 more source

Artificial molecular machines and motors—Design and control of nanoscale motion

open access: yesFEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

Enhancing Multi-Flight Unmanned-Aerial-Vehicle-Based Detection of Wheat Canopy Chlorophyll Content Using Relative Radiometric Correction

open access: yesRemote Sensing
Unmanned aerial vehicle (UAV) remote sensing has emerged as a powerful tool for precision agriculture, offering high-resolution crop monitoring capabilities.
Jiale Jiang, Qianyi Zhang, Shuai Gao
doaj   +1 more source

Classifying Inundation in a Tropical Wetlands Complex with GNSS-R

open access: yesRemote Sensing, 2019
The use of global navigation satellite system reflectometry (GNSS-R) measurements for classification of inundated wetlands is presented. With the launch of NASA’s Cyclone Global Navigation Satellite System (CYGNSS) mission, space-borne GNSS-R ...
Nereida Rodriguez-Alvarez   +3 more
doaj   +1 more source

Soft motions encoded by the fold and mediated by conserved hinge sites drive V‐ATPase allosteric machinery and autoinhibition

open access: yesFEBS Letters, EarlyView.
Vacuolar H+‐ATPase (V‐ATPase) is a multisubunit rotary proton pump that acidifies intracellular compartments. Using elastic network models, we identified conserved hinge residues that govern its large‐scale functional motions. We show that intrinsically encoded ‘soft modes’ drive critical functional transitions, including rotary catalysis and ...
Diksha Parwana   +3 more
wiley   +1 more source

Aptamer-functionalized impaction electrode for label-free impedimetric detection of airborne bacteria

open access: yesSensors and Actuators Reports
Rapid bioaerosol monitoring is constrained by the physical separation between aerosol collection and analytical readout, which introduces sample loss, dilution, and handling delays. Here, we move the bioreceptor to the front of this analytical chain.
Sanghyeon Noh   +6 more
doaj   +1 more source

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