in contrast , neoplastic ( bo ) cells showed a lower doubling time ( less than 20 hours ) , colony growth in soft agar ( greater than 20 colonies/30,000 cells ) , induction of multinucleation by cytochalasin b ( greater than or equal to 3 nuclei/cell ) , and tumors in nude mice were observed .
C0007634
cells
C0007610
nuclei/cell