Figure 3.

Tertiary and quaternary structures of LMO. (A) Stereoview of one subunit of LMO (C203A chain A) showing FMN (yellow carbons) and viewing into the barrel. The TIM‐barrel α‐helices (α1–α8) and β‐strands (1–8) are labeled. The segment connecting β4 and α4 is semitransparent with the αD conserved portion in light pink and the Loop 4 variable portion in dark pink. (B) Shown are views of the C203A LMO octamer looking down the crystallographic fourfold axis (left) and perpendicular to it (right). The two tetramers forming the octamer are based on chain A (shades of green) and chain C (shades of purple). See Supporting Information, Figure S2 for an alternate octamer observed for chains B and D in the wild‐type LMO crystals.