This is a NOESY of S. mitis J22
polysaccharide, both NOE and long range 3JCH show that it exits
in multiple conformers. By the way, the background music was played on Bruker NMR by Walter Bauer
Reference:
1. Q. W. Xu, S. Mohan & C. A. Bush "A flexible model for the cell
wall polysaccharide of S. sanguis J22 determined by three dimensional
13C filtered NOESY
spectra and 13C-1H long range coupling constants combined with
molecular
modeling" Biopolymers 38, 339-353 (1996)
2. Q. W. Xu, R. Gitti, and C. A. Bush "Comparision of NMR and Modeling Results for
a Rigid and a Felxible Oligosaccharide" Glycobiology 6, 281-288 (1996)