cytoplasmic hybrid ( cybrid ) cell lines were formed by fusing whole cells of rat yolk sac tumor cell line ( est-ii ) with cytoplasts of mouse fibroblastic cell line ( b-82cap ) , a variant of mouse l cell line that is deficient in thymidine kinase ( tk- ) and resistant to chloramphenicol ( capr ) .
C0010834
cytoplasmic
C0007634
cells