Articles with "non heme" as a keyword



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Heme and Non-heme Iron on Growth Performances, Blood Parameters, Tissue Mineral Concentration, and Intestinal Morphology of Weanling Pigs

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Published in 2018 at "Biological Trace Element Research"

DOI: 10.1007/s12011-018-1385-z

Abstract: This experiment was conducted to evaluate the effects of heme and non-heme iron sources on growth performances, blood parameters, tissue mineral concentration, and intestinal morphology in weanling pigs. At 25 days of age, 32 newly weaned… read more here.

Keywords: heme; heme iron; heme non; iron ... See more keywords
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Non-heme oxoiron(V) intermediates in chemo-, regio- and stereoselective oxidation of organic substrates

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Published in 2019 at "Coordination Chemistry Reviews"

DOI: 10.1016/j.ccr.2019.01.010

Abstract: Abstract In the last two decades, a number of synthetic iron-based biomimetic catalyst systems for the selective oxidation of organic compounds, such as epoxidations of alkenes and C–H oxidations of alkanes and arenes, have been… read more here.

Keywords: heme oxoiron; oxoiron intermediates; intermediates chemo; non heme ... See more keywords
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Preparation and characterization of iron-alginate beads with some types of iron used in supplementation and fortification strategies

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Published in 2018 at "Food Hydrocolloids"

DOI: 10.1016/j.foodhyd.2017.07.020

Abstract: Abstract Our work aimed to develop and characterize different alginate beads with either non-heme iron or a blend of heme/non-heme iron. We chose non-heme iron salts such as ferrous sulfate (FS), ferrous ammonium sulfate (FAS),… read more here.

Keywords: heme; heme iron; alginate beads; iron ... See more keywords
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Enzymatic N N bond formation: Mechanism for the N-nitroso synthesis catalyzed by non-heme iron SznF enzyme

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Published in 2021 at "Journal of Catalysis"

DOI: 10.1016/j.jcat.2021.04.010

Abstract: Abstract Enzymatic N-N bond formation is rare. Herein, the mechanism for the N-nitrosation from Nδ-hydroxy-Nω-hydroxy-Nω-methyl-L-arginine (L-HMA) catalyzed by SznF, a non-heme iron enzyme, has been illustrated, using density functional calculations. The reaction proceeds through the… read more here.

Keywords: bond formation; non heme; enzymatic bond; bond ... See more keywords
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High-resolution iron X-ray absorption spectroscopic and computational studies of non-heme diiron peroxo intermediates.

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Published in 2019 at "Journal of inorganic biochemistry"

DOI: 10.1016/j.jinorgbio.2019.110877

Abstract: Ferritin-like carboxylate-bridged non-heme diiron enzymes activate O2 for a variety of difficult reactions throughout nature. These reactions often begin by abstraction of hydrogen from strong CH bonds. The enzymes activate O2 at their diferrous cofactors… read more here.

Keywords: herfd xas; spectroscopy; non heme; peroxo ... See more keywords
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ATR-FTIR Spectroelectrochemical Study on the Mechanism of the pH Dependence of the Redox Potential of the Non-Heme Iron in Photosystem II.

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Published in 2021 at "Biochemistry"

DOI: 10.1021/acs.biochem.1c00341

Abstract: The non-heme iron that bridges the two plastoquinone electron acceptors, QA and QB, in photosystem II (PSII) is known to have a redox potential (Em) of ∼+400 mV with a pH dependence of ∼-60 mV/pH.… read more here.

Keywords: fe2 fe3; non heme; dependence; heme iron ... See more keywords
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Mechanisms of O2 Activation by Mononuclear Non-Heme Iron Enzymes.

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Published in 2021 at "Biochemistry"

DOI: 10.1021/acs.biochem.1c00370

Abstract: Two major subclasses of mononuclear non-heme ferrous enzymes use two electron-donating organic cofactors (α-ketoglutarate or pterin) to activate O2 to form FeIV═O intermediates that further react with their substrates through hydrogen atom abstraction or electrophilic… read more here.

Keywords: activation mononuclear; non heme; mononuclear non; mechanisms activation ... See more keywords
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A New Microbial Pathway for Organophosphonate Degradation Catalyzed by Two Previously Misannotated Non-Heme-Iron Oxygenases.

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Published in 2019 at "Biochemistry"

DOI: 10.1021/acs.biochem.9b00044

Abstract: The assignment of biochemical functions to hypothetical proteins is challenged by functional diversification within many protein structural superfamilies. This diversification, which is particularly common for metalloenzymes, renders functional annotations that are founded solely on sequence… read more here.

Keywords: heme iron; tmpa tmpb; iron oxygenases; iron ... See more keywords
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N-Nitrosation Mechanism Catalyzed by Non-heme Iron-Containing Enzyme SznF Involving Intramolecular Oxidative Rearrangement.

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Published in 2021 at "Inorganic chemistry"

DOI: 10.1021/acs.inorgchem.1c00057

Abstract: The non-heme iron-dependent enzyme SznF catalyzes a critical N-nitrosation step during the N-nitrosourea pharmacophore biosynthesis in streptozotocin. The intramolecular oxidative rearrangement process is known to proceed at the FeII-containing active site in the cupin domain… read more here.

Keywords: mechanism; nitrosation; sznf; heme iron ... See more keywords
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Selective Photo-Induced Oxidation with O2 of a Non-Heme Iron(III) Complex to a Bis(imine-pyridyl)iron(II) Complex

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Published in 2018 at "Inorganic Chemistry"

DOI: 10.1021/acs.inorgchem.8b00187

Abstract: Non-heme iron(II) complexes of pentadentate N4Py (N,N-bis(2-pyridylmethyl)-N-bis(2-pyridyl)methylamine) type ligands undergo visible light-driven oxidation to their iron(III) state in the presence of O2 without ligand degradation. Under mildly basic conditions, however, highly selective base catalyzed ligand… read more here.

Keywords: heme iron; bis; iron; non heme ... See more keywords
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O2 Activation by Non-Heme Thiolate-Based Dinuclear Fe Complexes.

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Published in 2020 at "Inorganic chemistry"

DOI: 10.1021/acs.inorgchem.9b03633

Abstract: Iron centers featuring thiolates in their metal coordination sphere (as ligands or substrates) are well-known to activate dioxygen. Both heme and non-heme centers that contain iron-thiolate bonds are found in nature. Investigating the ability of… read more here.

Keywords: dinuclear complexes; thiolate based; based dinuclear; activation ... See more keywords