title: Accurate determination of small one-bond heteronuclear residual dipolar couplings by F1 coupled HSQC modified with a G-BIRD(r) module.
abstract: We report a G-BIRD(r) modified coupled HSQC experiment for the accurate determination of one-bond heteronuclear residual dipolar couplings. The G-BIRD(r) module has been employed to refocus the long-range coupling evolution of the heteronucleus during the t1 frequency labeling period. As a result, the crosspeaks obtained are split by only the direct one-bond coupling that can be extracted by measuring simple frequency differences between singlet maxima. Additionally the decoupling of long-range multiple bond splittings leads to considerable sensitivity enhancement. The modification also has been applied in a TROSY sequence resulting in a significant sensitivity and resolution improvement.
authors.affiliation: Institute for Analytical Chemistry, University of Leipzig, Johnnisallee 29, D-04103, Leipzig, Germany.
authors.forename: Krisztina
authors.initials: K
authors.lastname: Fehér
authors.forename: Stefan
authors.initials: S
authors.lastname: Berger
authors.forename: Katalin E
authors.initials: KE
authors.lastname: Kövér
mesh_terms: D016880:Anisotropy; D003461:Crystallography / Q000379:methods*; D004151:Dipeptides / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000295:instrumentation* / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D004151:Dipeptides