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Search: WFRF:(Mthembu S. H.)

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  • Sithole, M. A., et al. (author)
  • Low- And medium-spin negative-parity bands in the Os 187 nucleus
  • 2021
  • In: Physical Review C. - 2469-9985. ; 103:2
  • Journal article (peer-reviewed)abstract
    • Low- and medium-spin negative-parity bands of Os187 have been studied using the AFRican Omnipurpose Detector for Innovative Techniques and Experiments (AFRODITE) array, following the W186(He4,3n)Os187 reaction at a beam energy of 37 MeV. In the current work, all the previously known bands have been significantly extended and three new bands have been added to the level scheme. The angular distribution ratio (RAD) and polarization measurements have been used to assign spin and parity to the observed new levels. The configurations of some of the bands have been modified. The observed bands are interpreted within the cranked shell model (CSM) and cranked Nilsson-Strutinsky-Bogoliubov (CNSB) formalism. Comparison with experimental data shows good agreements. Systematic comparison with the neighboring Os185 isotope is also discussed.
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3.
  • Mthembu, Yolanda H., et al. (author)
  • Recombinant mucin-type proteins carrying LacdiNAc on differentO-glycan core chains fail to supportH. pyloribinding
  • 2020
  • In: Molecular Omics. - : Royal Society of Chemistry (RSC). - 1742-206X .- 1742-2051 .- 2515-4184. ; 16:3, s. 243-257
  • Journal article (peer-reviewed)abstract
    • The beta 4-N-acetylgalactosaminyltransferase 3 (B4GALNT3) transfers GalNAc in a beta 1,4-linkage to GlcNAc forming the LacdiNAc (LDN) determinant on oligosaccharides. The LacdiNAc-binding adhesin (LabA) has been suggested to mediate attachment ofHelicobacter pylorito the gastric mucosaviabinding to the LDN determinant. TheO-glycan core chain specificity of B4GALNT3 is poorly defined. We investigated the specificity of B4GALNT3 on GlcNAc residues carried byO-glycan core 2, core 3 and extended core 1 precursors using transient transfection of CHO-K1 cells and a mucin-type immunoglobulin fusion protein as reporter protein. Binding of the LabA-positiveH. pyloriJ99 and 26695 strains to mucin fusion proteins carrying the LDN determinant on differentO-glycan core chains and human gastric mucins with and without LDN was assessed in a microtiter well-based binding assay, while the binding of(125)I-LDN-BSA to various clinicalH. pyloriisolates was assessed in solution. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) and western blotting confirmed the requirement of a terminal GlcNAc for B4GALNT3 activity. B4GALNT3 added a beta 1,4-linked GalNAc to GlcNAc irrespective of whether the latter was carried by a core 2, core 3 or extended core 1 chain. No LDN-mediated adhesion ofH. pyloristrains 26 695 and J99 to LDN determinants on gastric mucins or a mucin-type fusion protein carrying core 2, 3 and extended core 1O-glycans were detected in a microtiter well-based adhesion assay and no binding of a(125)I-labelled LDN-BSA neoglycoconjugate to clinicalH. pyloriisolates was identified.
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