Figure 1
A highly coordinated nitrate ion from the crystallization cocktail bridges two molecules in the asymmetric unit. (a) View roughly along the pseudo-twofold axis. Chain A is depicted in grey and chain B is in yellow. The side chains of Asn152, Asn159 and Asn161 are shown as sticks. (b) Dashed purple lines represent polar contacts between the nitrate ion (residue B201) and Asn152, Asn159 and Asn161 from chains A (grey) and B (yellow). A simulated-annealing OMIT 2mFo − DFc map is contoured at 1σ around the nitrate ion. |