Results 21 to 30 of about 25,172 (194)

Structure and molecular evolution of multicopper blue proteins

open access: yesBiomolecular Concepts, 2010
The multicopper blue protein family, which contains cupredoxin-like domains as a structural unit, is one of the most diverse groups of proteins. This protein family is divided into two functionally different types of enzymes: multicopper oxidase and ...
Komori Hirofumi, Higuchi Yoshiki
doaj   +1 more source

Nitrite accumulation during storage of tomato fruit as prevented by hydrogen gas

open access: yesInternational Journal of Food Properties, 2019
The adverse effects of intake nitrite upon human health are well known. However, eating fruits and vegetables is one of the main pathways to absorb nitrite because of nitrogen assimilation in plants.
Yihua Zhang   +8 more
doaj   +1 more source

Distribution of Denitrification among Haloarchaea: A Comprehensive Study

open access: yesMicroorganisms, 2021
Microorganisms from the Halobacteria class, also known as haloarchaea, inhabit a wide range of ecosystems of which the main characteristic is the presence of high salt concentration.
Jose María Miralles-Robledillo   +5 more
doaj   +1 more source

Influences of Growth Stage and Ensiling Time on Fermentation Characteristics, Nitrite, and Bacterial Communities during Ensiling of Alfalfa

open access: yesPlants, 2023
This study examined the impacts of growth stage and ensiling duration on the fermentation characteristics, nitrite content, and bacterial communities during the ensiling of alfalfa.
Jiangbo An   +6 more
doaj   +1 more source

Anti-oxidant effect of nitrite in the pancreatic islets of type 2 diabetic male rats [PDF]

open access: yesIranian Journal of Basic Medical Sciences, 2023
Objective(s): Nitrite, a nitric oxide (NO) donor, increases insulin secretion from pancreatic islets and has positive metabolic effects in type 2 diabetes (T2D). Here, we test the hypothesis of whether nitrite-induced insulin secretion is due to blunting
Asghar Ghasemi   +3 more
doaj   +1 more source

Regulation of Nitrite Reductase [PDF]

open access: yesPlant Physiology, 1987
A protein with molecular mass of 67 kilodaltons is immunoprecipitated from in vitro translated products obtained from rabbit reticulocyte lysate primed with polyadenylated RNA from nitrate treated illuminated pea seedlings. This protein resembles the native nitrite reductase because of its competitive elimination when immunoprecipitation of in vitro ...
S C, Gupta, L, Beevers
openaire   +2 more sources

Dissimilatory Nitrite and Nitric Oxide Reductases [PDF]

open access: yesChemical Reviews, 1996
The inorganic nitrogen cycle (Figure 1) consists of several linked biological processes and one abiological process, the reaction of N2 and O2 in lightning discharges and internal combustion engines to produce NOx and, ultimately, nitrate. All of the processes except nitrogen fixation involve reduction or oxidation of species containing N-O bonds of ...
openaire   +4 more sources

Influence of lead on N03 uptake and reduction in cucumber seedlings

open access: yesActa Societatis Botanicorum Poloniae, 2014
The influence of PbCl2 on NO3- uptake and activity level of nitrate (NR) and nitrite MR) reductases in cotyledons and roots of cucumber seedlings was studied.
Marek Burzyński, Adam Grabowski
doaj   +1 more source

Nitrate and nitrite reductase activities of Mycobacterium avium

open access: yesInternational Journal of Mycobacteriology, 2018
Background: In spite of the fact that the standard test for nitrate reductase activity is negative for Mycobacterium avium, it can grow in a defined minimal medium with either nitrate (NO3) or nitrite (NO2) as sole nitrogen sources.
Nitin S Butala, Joseph Oliver Falkinham
doaj   +1 more source

Intramolecular Electron Transfer in Nitrite Reductases [PDF]

open access: yesChemPhysChem, 2005
AbstractThe copper‐ and heme‐containing nitrite reductases (NiRs) are key enzymes in denitrification. Their subunits contain two distinct redox‐active metal centers, an electron‐accepting site and a nitrite‐reducing site, to carry out the single‐electron reduction of nitrite to nitic oxide. Catalytic cycles of both enzyme families employ intramolecular
Scot, Wherland   +2 more
openaire   +2 more sources

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