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Binding specificity of [125I]I-PIB-Ec1 to epithelial cell adhesion molecule (EpCAM)-expressing OVCAR-3 and SKOV-3 ovarian cancer cells in vitro. For blocking, 100-fold molar excess of non-labeled Ec1 DARPin was added to blocked groups. Final concentration of radiolabeled compound was 2 nM. Data are presented as mean from three samples ± SD.
