New insights into the bonding arrangements of L- and D-glutamates from solid state<sup>17</sup>O NMR
Lemaitre V., Pike KJ., Watts A., Anupold T., Samoson A., Smith ME., Dupree R.
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 glutamate-HCl is very different again requiring the application of double angle rotation and 3 quantum MAS NMR to provide resolution of 5 different sites. Hence high resolution 17 O solid state NMR techniques offer possible new insight into biochemical bonding processes. © 2003 Elsevier Science B.V. All rights reserved.