Crystal structures of a bacterial dipeptidyl peptidase IV revealing a novel substrate recognition mechanism distinct from that of mammalian orthologues are published by Roppongi et al. and are available (5YP1, 5YP2, 5YP3, 5YP4) Structure of Namib Desert hypoliths metagenome Acetyl-esterase deacetylase is published by Adesioye et al. and will be available soon (6FKX) Relationship between the dimerization of thyroglobulin and its ability to form triiodothyronine is published by Citterio et al.