(19)

(11)

EP 0 394 301 A1

(12)

(43) Date of publication: 31.10.1990 Bulletin 1990/44 (21) Application number: 89900009.0 (22) Date of filing: 29.11.1988

(51) International Patent Classification (IPC):  G01N 33/ 92( . ) (86) International application number: PCT/GB1988/001044 (87) International publication number: WO 1989/005458 (15.06.1989 Gazette 1989/13)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 03.12.1987 GB 19870028310 (71) Applicants: OXFORD VIROLOGY LIMITED Westminster London SW1P 3AY (GB) ST. GEORGE'S HOSPITAL MEDICAL SCHOOL London SW17 ORB (GB)	(72) Inventor: KNOX, Peter Chalfont St. Giles, Buckinghamshire (GB) (74) Representative: Allam, Peter Clerk, et al  LLOYD WISE, TREGEAR & CO. Norman House 105-109 Strand London WC2R 0AE London WC2R 0AE (GB)