| abstract |
Herein is reported a circular fusion polypeptide comprising a first part of a binding domain, a second part of a binding domain and a spacer domain, wherein the spacer domain is a polypeptide and comprises at least 25 amino acid residues, the first part of the binding domain is a polypeptide and is fused via a first linker to the N-terminus of the spacer domain, the second part of the binding domain is a polypeptide and is fused via a second linker to the C-terminus of the spacer domain, the first part of the binding domain and the second part of the binding domain are associated with each other and form a binding site that specifically binds to a target. |