(A) Top, MiroS shown in the 'top view'. ELM1 and ELM2 are related by pseudo twofold symmetry, represented by the dyad between them. Bottom, overlay of the two ELM domains (rmsd of 1.8 Å over 84 Cα positions). ELM1 (blue), ELM2 (green) and identical or similar conserved residues in identical positions are shown as sticks. 