BIVALENT BISPECIFIC ANTIBODIES Russian patent published in 2015 - IPC C07K16/46 C12N15/63 A61K39/395 

FIELD: chemistry.

SUBSTANCE: invention relates to field of biochemistry, in particular to method of obtaining bivalent bispecific antibody, which includes transformation of host cell by vectors, containing molecules of nucleic acids, coding first light chain and first heavy chain of bivalent bispecific antibody, and vectors, containing molecules of nucleic acids, coding second light chain and second heavy chain of bivalent bispecific antibody, cultivation of host cell under conditions, providing synthesis of molecule of bivalent bispecific antibody from said culture. Said antibody contains first light chain and first heavy chain of antibody, specifically binding with first antigen, and second light chain and second heavy chain of antibody, specifically binding with second antigen, in which variable domains VL and VH of second light chain and second heavy chain are replaced by each other and constant domains CL and CH1 of second light chain and second heavy chain are replaced by each other.

EFFECT: invention makes it possible to increase output of correct bispecific antibody by increasing the level of correct heterodimerisation of heavy chains of wild type and modification of heavy chains resulting from crossing over.

2 cl, 31 dwg, 3 tbl, 4 ex