Absent oligosaccharides. The omit maps of the four oligosaccharides from Kumar et al. (2007) are shown for the protein complexed with the following oligosaccharides: (a) trisaccharide (PDB entry 2dt0
), (b) tetrasaccharide (PDB entry 2dt1
), (c) pentasaccharide (PDB entry 2dt2
) and (d) hexasaccharide (PDB entry 2dt3
). The 2.45 Å (a), 2.09 Å (b), 2.9 Å (c) and 2.28 Å (d) resolution mFo − DFc maps contoured at ±3σ (green/red) and 2mFo − DFc maximum-likelihood omit maps contoured at 1σ (blue) are shown. Maps were calculated for a refined model with the ligand atoms omitted.