(19)

(11)

EP 0 517 751 A1

(12)

(43) Date of publication: 16.12.1992 Bulletin 1992/51 (21) Application number: 91904701.0 (22) Date of filing: 25.02.1991

(51) International Patent Classification (IPC):  C12N 15/ 09( . ) C12N 15/ 74( . ) (86) International application number: PCT/AU1991/000064 (87) International publication number: WO 1991/013157 (05.09.1991 Gazette 1991/21)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 26.02.1990 AU 19900008815 (71) Applicant: COMMONWEALTH SCIENTIFIC & INDUSTRIAL RESEARCH ORGANISATION ( C.S.I.R.O. ) Campbell ACT 2601 (AU)	(72) Inventors: RADFORD, Anthony, John Kew, VIC 3101 (AU) HODGSON, Adrian, L., M. East Malvern, VIC 3145 (AU) (74) Representative: Marshall, Monica Anne, et al  J.A. KEMP & CO. 14 South Square Gray's Inn London WC1R 5LX London WC1R 5LX (GB)