Figure 1.

Structural characterization of A. faecalis core OS and O‐antigen. a) Zoom of the superimposition of ¹H, ¹H,¹³C HSQC and ¹H,¹³C HMBC NMR spectra of the fully deacylated LOS from A. faecalis. Key inter‐residue long‐range correlations are indicated. Numbering of sugar residues is as reported in Table S1 and Figure 2. b) Structure of the core OS elucidated by NMR spectroscopy, reported using letters as indicated in Table S1 and Figure 2. c) Zoom of the superimposition of proton, HSQC and HMBC NMR spectra after mild acid hydrolysis performed on the LPS fraction. Key inter‐residue long‐range correlations are indicated as in Table S2. d) Structure of the main pentasaccharide repeating unit comprising the O‐antigen as deduced by NMR spectroscopy and reported using the letters in Table S2 and Figure 2.