Antibody constructs for CD70 and CD3

A bispecific antibody construct comprising a first binding domain which binds to human CD70 on the surface of a target cell and a second binding domain which binds to human CD3 on the surface of a T cell and at least macaque CD3, wherein the first binding domain comprises a VH region comprising CDR-H1, CDR-H2 and CDR-H3 and a VL region comprising CDR-L1, CDR-L2 and CDR-L3, wherein

• said CDR-H1 comprises the amino acid sequence of SEQ ID NO:
• 1142;
• said CDR-H2 comprises the amino acid sequence of SEQ ID NO:
• 1143;
• said CDR-H3 comprises the amino acid sequence of SEQ ID NO:
• 1144;
• said CDR-L1 comprises the amino acid sequence of SEQ ID NO:
• 1145;
• said CDR-L2 comprises the amino acid sequence of SEQ ID NO:
• 1146;
• and
• said CDR-L3 comprises the amino acid sequence of SEQ ID NO:
• 1147.