PROBLEM TO BE SOLVED: To provide an anti-BBI protein antibody having excellent specificity, quantitativity, and detection sensitivity.SOLUTION: A crosslinking agent is used for cross-linking of BBI proteins to prepare a homo complex, and it is used as an immunogen to prepare an antibody.COPYRIGHT: (C)2015,JPO&INPIT【課題】特異性、定量性、および検出感度において優れた抗BBIタンパク質抗体を提供する。【解決手段】架橋剤によりBBIタンパク質同士を架橋させてホモ複合体を調製し、これを免疫原として抗体を作成する。【選択図】図8