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 will be available soon (5YP1, 5YP2, 5YP3, 5YP4) Structural insight into molecular mechanism of poly(ethylene terephthalate) degradation is published by Joo et al. and structures are available (5XJH, 5YNS)