Missing ligand density, ligand omit map. The active site of S. pneumoniae hyaluronate lyase shows no meaningful density for the entire hexasaccharide molecule in the structure (PDB entry 1n7q
; Nukui et al., 2003). Disaccharide unit labels are consistent with the original publication. The 2.3 Å resolution mFo − DFc map contoured at ±3σ (green/red) and 2mFo − DFc maximum-likelihood omit map contoured at 1σ (blue) are shown. Maps were calculated for a refined model with the ligand atoms omitted.