Precursors of quinone tanning: Dopa-containing proteins / J. Herbert Waite -- Isolation of 2,4,5-trihydroxyphenylalanine quinone (topa quinone) from copper amine oxidases / Susan M. Janes, Judith P. Klinman -- Spectrophotometric detection of topa quinone / Monica M. Palcic, Susan M. Janes -- Model studies of topa quinone: Synthesis and characterization of topa quinone derivatives / Minae Mure, Judith P. Klinman -- Catalytic aerobic deamination of activated primary amines by a model for the quinone cofactor of mammalian copper amine oxidases / Lawrence M. Sayre, Younghee lee -- Detection of reaction intermediates in topa quinone enzymes / Christa Hartmann, David M. Dooley -- Mass spectrometric studies of the primary sequence and structure of bovine liver and serum amine oxidase / Gregory W. Adams, Petra Mayer, Katalin F. Medzihradszky, Alma L. Burlingame -- Cloning of mammalian topa quinone-containing enzymes / David Mu, Judith P. Klinman -- Isolation of active site peptides of lysyl oxidase / Herbert M. Kagan, Ping Cai -- Resonance Raman spectroscopy of quinoproteins / David M. Dooley, Doreen E. Brown -- Redox-cycling detection of dialyzable pyrroloquinoline quinone and quinoproteins / Rudolf Flückiger, Mercedes A. Paz, Paul M. Gallop -- Tryptophan tryptophylquinone in bacterial amine dehydrogenases / William S. McIntire -- Model studies of cofactor tryptophan tryptophylquinone / Shinobu Itoh, Yoshiki Ohshiro -- Detection of intermediates in tryptophan tryptophylquinone enzymes / Victor L. Davidson, Harold B. Brooks, M. Elizabeth Graichen, Limei H. Jones, Young-Lan Hyun -- X-ray studies of quinoproteins / F. Scott Mathews -- Genetics of bacterial quinoproteins / Mary E. Lidstrom -- Biogenesis of pyrrolquinone quinone from 3C-labeled tyrosine / Clifford J. Unkefer, David R. Houck, B. Mark Britt, Tobin R. Sosnick, John L. Hanners -- X-ray crystallographic studies of cofactors in galactose oxidase / Nobutoshi Ito, Peter F. Knowles, Simon E.V. Phillips -- Spectroscopic studies of galactose oxidase / James W. Whittaker -- Use of rapid kinetics methods to study the assembly of the diferric-tyrosyl radical cofactor of E. coli ribonucleotide reductase / J. Martin Bollinger Jr., Wing Hang Tong, Natarajan Ravi, Boi Hanh Huynh, Dale Edmondson, JoAnne Stubbe -- Tyrosyl radicals in photosystem II / Bridgette A. Barry -- Role of tryptophans in substrate binding and catalysis by DNA photolyase / Sang-Tae Kim, Paul F. Heelis, Aziz Sancar -- Glycyl free radical in pyruvate formate-lyase: Synthesis, structure characteristics, and involvement in catalysis / Joachim Knappe, A.F. Volker Wagner -- Characterization of a radical intermediate in the lysine 2,3-aminomutase reaction / George H. Reed, Marcus D. Ballinger -- Role of oxidized amino acids in protein breakdown and stability / Earl R. Stadtman.