Fig. 2.
Active site of unliganded N225D trichodiene synthase. (a) Simulated annealing omit maps of D225 and magnesium ion are shown in cyan (4.7Å) and maroon (6.0Å), respectively. The Mg2+ ion is shown as a gray sphere. Metal ion coordination interactions are shown in black. (b) Superposition with the active site of unliganded trichodiene synthase (purple).