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The mechanism of autoreduction in Dehaloperoxidase-A.
Biochem Biophys Res Commun
December 2024
Department of Chemistry, North Carolina State University, Raleigh, NC, 27695, USA. Electronic address:
Hemoglobin and myoglobin are known to undergo autoxidation, in which the oxyferrous form of the heme is oxidized to the ferric state by O. Dehaloperoxidase-A (DHP-A), a multifunctional catalytic hemoglobin from Amphitrite ornata is an exception and is observed to undergo the reverse process, during which the ferric heme is spontaneously reduced to the oxyferrous form under aerobic conditions. The high reduction potential of DHP (+202 mV at pH 7.
View Article and Find Full Text PDFFrustrated Magnetism and Spin Anisotropy in a Buckled Square Net YbTaO.
Inorg Chem
December 2024
School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
The interplay between quantum effects from magnetic frustration, low-dimensionality, spin-orbit coupling, and crystal electric field in rare-earth materials leads to nontrivial ground states with unusual magnetic excitations. Here, we investigate YbTaO, which hosts a buckled square net of Yb ions with = 1/2 moments. The observed Curie-Weiss temperature is about -1 K, implying an antiferromagnetic coupling between the Yb moments.
View Article and Find Full Text PDFEffect of Monosaccharides Including Rare Sugars on the Bilayer Phase Behavior of Dimyristoylphosphatidylcholine.
Membranes (Basel)
December 2024
Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan.
We observed bilayer phase transitions of dimyristoylphosphatidylcholine (DMPC) in aqueous solutions of four kinds of monosaccharides, namely, D-glucose, D-fructose, D-allose and D-psicose, using differential scanning calorimetry (DSC). D-allose (C3-epimer of D-glucose) and D-psicose (C3-epimer of D-fructose) are rare sugars. We performed DSC measurements using two types of sugar-containing sample dispersions of the DMPC vesicles: one is a normal sample dispersion with no concentration asymmetry between the inside and outside of the vesicles and the other is an unusual sample dispersion with a concentration asymmetry.
View Article and Find Full Text PDFAn Unusual Cause of Inguinal Mass in a Patient with Urolithiasis: A Case Report of Deep (Aggressive) Angiomyxoma in a Male Patient.
Clin Pract
December 2024
Department of Urology, University Hospital of Patras, 26504 Patras, Greece.
Deep or aggressive angiomyxoma is an uncommon neoplasm of the pelvis. Although deep angiomyxoma is a benign tumor, its tendency to infiltrate soft tissues and reach a large size (typically > 10 cm) indicates aggressive biological behavior. It is usually present in female patients, but there have been recent reports of male-aggressive angiomyxoma.
View Article and Find Full Text PDFUnusual Endotaxy Growth of Hexagonal Nanosheets by the Self-Assembly of a Homopolymer.
Angew Chem Int Ed Engl
December 2024
Tongji University, School of Material Science and Engineering, CHINA.
A classical crystallization usually grows epitaxially from a crystal nucleus. Presented in this study is an unusual endotaxy growth manner of a crystalline homopolymer to form hexagonal nanosheets. The amphiphilic homopolymer, poly(3-(4-(phenyldiazenyl)phenoxy)propyl methacrylate) (PAzoPMA), is first annealed in isopropanol to afford a hexagonal nut-like structure.
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