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Figure 2
(a) Asn26L, located at the onset of L1, points out of the antigen-binding region into solvent. Shown is the first N-linked β-N-acetylglucosamine (NAG), the α-1–6-linked fucose and the first β-1–4-linked NAG of the extended glycan branch. 2mFo − DFc density is displayed at 0.8σ. In the deposited conservative N14 model, only the Asn-linked NAG has been retained. (b) The K+-binding site linking Asp207H (ball-and-stick representation) and the symmetry-related Ser71H and Asp55H (purple sticks) is shown together with coordinated water molecules (purple balls). Density levels are 1.3σ (blue) and 5σ (magenta, around the K+ cation). See §[link]3.5 for a discussion of glycan modelling.

Journal logoSTRUCTURAL
BIOLOGY
ISSN: 2059-7983
Volume 72| Part 12| December 2016| Pages 1267-1280
https://doi.org/10.1107/S205979831601723X
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