Conformational stabilization of the altruronic acid residue in the O-specific polysaccharide of Shigella sonnei/Plesiomonas shigelloides
摘要:
Complete assignments for the H-1- and the C-13-NMR spectra of the O-specific polysaccharide of S. sonnei/Plesiomonas shigelloides are reported. Evidence is presented that in this polysaccharide both pyranose residues exist preferentially in the C-4(1) chair conformation and that the polysaccharide exists in the zwitterion form. (C) 1998 Elsevier Science Ltd.