6-Pyruvoyl Tetrahydropterin Synthase, An Enzyme With a Novel Type of Active Site Involving Both Zinc Binding and an Intersubunit Catalytic Triad Motif; Site-directed Mutagenesis of the Proposed Active Center, Characterization of the Metal Binding Site and Modelling of substrate BindingDaniel Bürgisser, Herbert Nar, U. Redweik et al.|Journal of Molecular Biology|1995Cited by 59