Structures of YbtT: a low-specificity type II thioesterase that maintains production of the metallophore yersiniabactin in pathogenic enterobacteria (WT and S89A mutant) are available (6BA8, 6BA9) and published by Ohlemacher et al. Structures of new thermophilic alpha/beta Class epoxide hydrolases found in metagenomes from hot environments are published by Ferrandi et al. and are available (5NFQ, 5NG7).