申请人:ASTELLAS PHARMA INC.
公开号:US20220105194A1
公开(公告)日:2022-04-07
Provided is a conjugate comprising a ligand, a spacer, and a peptide linker useful for an in-vivo diagnostic drug and internal radiation therapy, using an anti-human MUC1 antibody Fab fragment whose binding activity is not attenuated even by labeling with a metal, a fluorescent dye, or the like. A conjugate comprising 3arm DOTA, a specific spacer, a specific peptide linker, and a biomolecule including an anti-human MUC1 antibody Fab fragment, wherein the binding activity thereof is not attenuated even by labeling with a metal, a fluorescent dye, or the like, can be used as a diagnostic composition and/or a pharmaceutical composition.