Composite antibodies of human subgroup IV light chain capable of binding to tag-72

摘要

2121041 9312231 PCTABS00023 This invention concerns a subset of composite Hum4 VL, VH.alpha.TAG antibody with high affinities to a high molecular weight, tumor-associated sialylated glycoprotein antigen (TAG-72) of human origin. These antibodies have variable regions with (1) VL segments derived from the human subgroup IV germline gene and (2) a VH segment which is capable of combining with the VL to form a three dimensional structure having the ability to bind TAG-72. in vivo methods of treatment and diagnostic assay using these composite antibodies is also disclosed.