[1] UNIV NEUCHATEL,BIOCHIM LAB,CH-2007 NEUCHATEL,SWITZERLAND
[2] CNRS,INST BIOL MOLEC PLANTES,F-67084 STRASBOURG,FRANCE
[3] LEIDEN UNIV,INST MOLEC PLANT SCI,NL-2300 RA LEIDEN,NETHERLANDS
[4] FRIEDRICH MIESCHER INST,CH-4002 BASEL,SWITZERLAND
[5] BIOTECHNOL RES,DK-1001 COPENHAGEN K,DENMARK
[6] CIBA GEIGY CORP,BIOTECHNOL RES,RES TRIANGLE PK,NC 27709