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17 O solid-state NMR is a highly sensitive probe of structural detail of organic solids but improvements in sensitivity and resolution are crucial for it to be applied to larger biological molecules. Here it is shown that high resolution (∼1ppm) and significant signal enhancement can be achieved by combining 1 H decoupled double rotation (DOR), which narrows the lines by a factor of ∼100...
Magic angle spinning (MAS) from l- and d-glutamic acid-HCl at 14.1 T produces highly structured and very similar NMR spectra. Lines from all 4 oxygen sites are readily distinguished and assigned. These 17 O NMR spectra are very different from the previously reported 17 O spectrum of the d,l-form presumably because that was a racemic crystal. 17 O NMR from l-monosodium...
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