镧系离子诱导的各向同性位移和展宽用于模型膜的核磁共振结构分析。
Lanthanide ion-induced isotropic shifts and broadening for nuclear magnetic resonance structural analysis of model membranes.
作者信息
Andrews S B, Faller J W, Gilliam J M, Barrnett R J
出版信息
Proc Natl Acad Sci U S A. 1973 Jun;70(6):1814-8. doi: 10.1073/pnas.70.6.1814.
Abstract
The effects of a series of aquated lanthanide ions on the nuclear magnetic resonance spectrum of phospholipid bilayer suspensions are reported. The ability of these ions to provide a spectral distinction between morphologically exterior resonances and their interior counterparts was confirmed. Measurements of the relative shifting and broadening capabilities of these ions are reported, and their correlation with solid-state magnetic susceptibility anisotropies is shown to implicate a dipolar (pseudocontact) mechanism as the source of this effect. The potential for the use of dipolar shifts as structural probes is discussed and an alternative method using dipolar shifting and broadening reagents simultaneously is presented.
摘要
报道了一系列水合镧系离子对磷脂双层悬浮液核磁共振谱的影响。证实了这些离子能够在形态学上区分外部共振和内部共振。报道了这些离子的相对位移和展宽能力的测量结果，并且表明它们与固态磁化率各向异性的相关性暗示了偶极（伪接触）机制是这种效应的来源。讨论了使用偶极位移作为结构探针的潜力，并提出了一种同时使用偶极位移和展宽试剂的替代方法。
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