SEARCH Articles Figures Tables Active sites structures Catalyst Structure Nature of the Active Site Comparison of Protein Active-Site Structures Local structure of active sites Single-crystal structure of a-Fe and the active sites Site Structure Site structural Structure and Mechanism of Metalloenzyme Active Sites Structure and function the active site of ALAS Structure of MMOH active site Structures and Spectral Properties of the Redox-Active Metal Sites Structures and the Active Site of Scytalone Dehydratase Structures of the active sites