Biochemical and Biophysical Research Communications
Simultaneous observation of positive and negative nuclear overhauser effects in oligopeptides due to segmental motion
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Cited by (11)
Tailoring the nuclear Overhauser effect for the study of small and medium-sized molecules by solvent viscosity manipulation
2021, Progress in Nuclear Magnetic Resonance SpectroscopyCitation Excerpt :In addition, the high dissolution power of DMSO‑d6 (ε = 46.02 at 20 °C) [50] opens the way to NMR investigation of a very wide range of polar and moderately apolar organic compounds. From the late ‘70 s to date, neat DMSO‑d6 has been used in many NMR studies, carried out at various temperatures, for the observation of negative NOE enhancements [51–93]. The following examples focus on the investigation of several well-known antibiotics such as Vancomycin, Valinomycin, and Ristocetin, all dissolved and analysed in pure DMSO‑d6.
Structure and molecular dynamics of sodium dodecylsulfate micelles modified with hydrophilic short-chain imidazolium salts in aqueous solution
2016, Journal of Colloid and Interface ScienceCitation Excerpt :In addition to R4NBr/SDS systems [38], the two RmimBF4/SDS systems under investigation are other micellar systems in which the SDS molecules in the micelle show simultaneous positive and negative NOE. The extremely different tumbling rate on the same molecule only has been found in polypeptides and dendrimers [60–62]. It is worthy of further investigation to find whether simultaneous positive and negative NOE are general phenomena for the organic salt/SDS mixed systems.
Modification of DOBOB mesogen
2004, PolymerCitation Excerpt :The sign of the NOEs observed between spatially proximate protons depend on the segmental mobility. Uma et al. reported simultaneous observation of both positive and negative nuclear Overhauser effects (NOEs) in Cys-(Val)n,-Trp oligopeptides, of which the negative NOE is owing to the slow motion of local segmental tumbling [13]. A NOESY study of the monodendron DOBOB acid revealed that there are negative NOEs for the benzyl unit: both the methylene (–CH2O–) protons (with chemical shifts around 4.0 and 5.0 ppm) are correlated with aromatic (C6H4O) protons (with chemical shifts from 6.7 to 7.4 ppm) through space (Fig. 2).
A diffusion equation approach to spin diffusion in biomolecules
1989, Journal of Magnetic Resonance (1969)NMR studies on effects of tetraalkylammonium bromides on micellization of sodium dodecylsulfate
2013, Journal of Physical Chemistry B3<inf>10</inf> helix formation in protected tripeptide
1998, Protein and Peptide Letters