(19)

(11)

EP 1 121 446 A1

(12)

(43) Date of publication: 08.08.2001 Bulletin 2001/32 (21) Application number: 99949259.8 (22) Date of filing: 20.10.1999

(51) International Patent Classification (IPC)7: C12N 15/55, C12N 9/80, C12N 11/14, C12P 41/00, C12P 13/04 (86) International application number: PCT/GB9903/458 (87) International publication number: WO 0023/598 (27.04.2000 Gazette 2000/17)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 20.10.1998 GB 9822947 01.04.1999 GB 9907739 (71) Applicant: Chirotech Technology Limited Cambridge CB4 0WG (GB)	(72) Inventors: TAYLOR, Stephen, John, Clifford Cambridge CB4 0WG (GB) BROWN, Robert, Christopher Cambridge CB4 0WG (GB) (74) Representative: Perry, Robert Edward  GILL JENNINGS & EVERYBroadgate House7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)