Patent ID: 7008623

Claim:
An isolated diagnostic monoclonal antibody binds specifically to the CD23 (FCRεII) type II molecule expressed on haematopoietic cells, said monoclonal antibody comprising light chain variable domains CDRL1, CDRL2, and CDRL3, further comprising heavy chain variable domains CDRH1, CDRH2, and CDRH3, wherein CDRL1 consists of the amino acid sequence RSSKSLLY KDGKTYLN of SEQ ID NO:1, CDRL2 consists of the amino acid sequence LMSTRAS of SEQ ID NO:5, CDRL3 consists of the amino acid sequence QQLVEYPFT of SEQ ID NO:7, CDRH1 consists of the amino acid sequence GYWMS of SEQ ID NO:9, CDRH2 consists of amino acid sequence EIRLKSDNYATHYAESVKG of SEQ ID NO:11, and CDHR3 consists of amino acid sequence FID of SEQ ID NO:13.