Results 31 to 40 of about 654,842 (253)
Journal of Integrative Agriculture, 2015 In legume plants, uricase gene (Nodulin-35) plays a positive role in metabolism of ureide and amide compounds in symbiotic nitrogen-fixing in the nodules. In this study, a pot experiment was performed to examine the effects of ammonium application on the
Li WANG +4 more
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Ammonium transporters in grasses : molecular and functional characterization with special reference to the arbuscular mycorrhizal symbiosis [PDF]
, 2013 Most herbaceous plants live in symbiosis with arbuscular mycorrhizal (AM) fungi. AM fungi colonize the roots of their host plant symbionts and provide them with mineral nutrients, especially phosphorus (P) and nitrogen (N) and receive, in exchange ...
Koegel, Sally
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First-principles calculations of equilibrium nitrogen isotope fractionations among aqueous ammonium, silicate minerals and salts [PDF]
, 2021 Nitrogen isotopes are a robust tool to study geological nitrogen cycle between Earth’s reservoirs. However, the application of nitrogen isotope system to understanding geological processes has been limited by the lack of constraints on equilibrium ...
Li, Long, Li, Yonghui, Wu, Zhongqing
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Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
Frontiers in Plant Science, 2022 Nitrogen isotope discrimination (Δ15N) may have utility as an indicator of nitrogen use in plants. A simple Δ15N-based isotope mass balance (IMB) model has been proposed to provide estimates of efflux/influx (E/I) ratios across root plasma membranes, the
Yi Hu +3 more
doaj +1 more source
2-Arylacetic anhydrides as ammonium enolate precursors [PDF]
, 2014 This work is supported by funding from the Carnegie Trust for the Universities of Scotland and EPSRCReadily prepared 2-arylacetic anhydrides act as convenient ammonium enolate precursors in isothiourea (HBTM-2.1)-mediated catalytic asymmetric ...
Morrill, Louis C. +8 more
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FEBS 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
FEBS 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
Carboxylates and the uptake of ammonium by excised maize roots [PDF]
, 1975 The effect of carboxylates (organic acid anions) on NH 4 uptake was studied by changing the carboxylate level of roots prior to uptake experi ments. Succinate was the most effective stimulator of ammonium uptake.
Breteler, H.
core
Interaction ammonium-nitrate: Response to oxidative stress in chicory plants [PDF]
, 2010 The aim of this work was to study, as a function of the different availability of nitrogen in the reduced form, mineral and organic, the induction of the synthesis of some ROS-scavenging molecules and the evolution of some enzymatic activities such as ...
Adalgisa Belligno +3 more
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