Proteins comprising kallikrein related peptidase 2 antigen binding domains and their uses

An isolated anti-hK2/anti-CD3 antibody comprising a first domain that binds hK2 and a second domain that binds CD3, wherein the first domain that binds hK2 comprises a HCDR1, a HCDR2, a HCDR3, a LCDR1, a LCDR2 and a LCDR3 of SEQ ID NOs:

• 170, 171, 172, 173, 174 and 175, respectively, and the second domain that binds CD3 comprises the HCDR1, the HCDR2, the HCDR3, the LCDR1, the LCDR2 and the LCDR3 of SEQ ID NOs:
• 255, 256, 257, 258, 259 and 261, respectively.

An isolated anti-hK2/anti-CD3 antibody comprising a first domain that binds hK2 and a second domain that binds CD3, wherein the first domain that binds hK2 comprises a VH of SEQ ID NO:

• 162 and a VL of SEQ ID NO:
• 163, and the second domain that binds CD3 comprises a scFv of SEQ ID NO:
• 331.

An isolated anti-hK2/anti-CD3 antibody comprising a HC1 of SEQ ID NO:

• 354, a LC1 of SEQ ID NO:
• 221 and a HC2 of SEQ ID NO:
• 360.

An isolated anti-hK2/anti-CD3 antibody comprising a HC1 of SEQ ID NO:

• 361, a LC1 of SEQ ID NO:
• 221 and a HC2 of SEQ ID NO:
• 362.