[1] MAX PLANCK INST MED RES,DEPT BIOPHYS,D-6900 HEIDELBERG,FED REP GER
[2] YALE UNIV,DEPT MOLEC BIOPHYS & BIOCHEM,NEW HAVEN,CT 06511
[3] HARVARD UNIV,DEPT CHEM,CAMBRIDGE,MA 02138
[4] UNIV WASHINGTON,DEPT CHEM,SEATTLE,WA 98195
[5] STANFORD UNIV,STANFORD MAGNET RESONANCE LAB,STANFORD,CA 94305
[6] NIDR,DEPT HLTH & HUMAN SERV,BIOCHEM LAB,BETHESDA,MD 20205
[7] UNIV LONDON IMPERIAL COLL SCI & TECHNOL,BLACKETT LAB,LONDON SW7 2BZ,ENGLAND
[8] UNIV OXFORD,DEPT INORGAN CHEM,OXFORD OX1 3PR,ENGLAND
[9] UNIV CAMBRIDGE,SCH MED,OTOLARYNGOL,MOLEC BIOL LAB,CAMBRIDGE CB2 2QH,ENGLAND
[10] UNIV CAMBRIDGE,DEPT BIOCHEM,CAMBRIDGE CB2 1QW,ENGLAND
[11] MIT,DEPT CHEM,CAMBRIDGE,MA 02139
[12] MAX PLANCK INST BIOCHEM,D-8033 MARTINSRIED,FED REP GER
[13] UNIV LONDON IMPERIAL COLL SCI & TECHNOL,DEPT CHEM,LONDON SW7 2AY,ENGLAND
[14] UNIV OXFORD,INORGAN CHEM LAB,OXFORD OX1 3QR,ENGLAND