tokens: Subsequently , TCF-1 -specific hybridomas could be prepared from the spleens of immunized knock-out mice .
folded_tokens: subsequently , tcf-1 -specific hybridomas could be prepared from the spleens of immunized knock-out mice .
labels: O O B-protein_molecule O O O O O O O B-body_part O B-other_artificial_source I-other_artificial_source I-other_artificial_source O