SEARCH Articles Figures Tables Adsorption sites transition metal cations Coordination sites in host mineral structures accommodating transition metal ions Crown ether ligands, containing bipyridyl transition metal recognition sites Defect sites, transitions Enzyme Active Sites Are Most Complementary to the Transition State Structure Possible role of small reactors without on-site refuelling in the transition from an open to a global closed nuclear fuel cycle Site-Specific Internal Functionalization of Nucleic Acids with Transition-Metal Ligands and Other Moieties Substrate Conformational Transition and the Role of Active Site Residues The Active Site and Transition States Transit peptide cleavage site Transition metal complexes ligand site preferences Transition metals sites with Lewis acidic properties Transition state theories site model theory