US Patent 10359432 Methods for detecting antibodies

Complexes comprising a therapeutic monoclonal antibody and a peptide are provided. In some embodiments, the complexes may comprise a therapeutic monoclonal antibody which is not complexed to an epitope of a target protein and a peptide complexed to the therapeutic monoclonal antibody. In some embodiments, the peptide may have a length of about 5-40 amino acids and may comprise a mimetope recognized by the therapeutic monoclonal antibody, wherein the mimetope comprises a linear sequence of amino acids which is different than a linear sequence of amino acids in the epitope of the target protein.