incubation of unfixed thymocytes in media containing amp-pnp , 5'-amp or p-nitrophenyl phosphate , but not beta -glycerophosphate , induced both in the nucleus and in the cytoplasm in some cells an appearance of a transitory reticular formation consisting of about 303nm thick strands which could penetrate the nuclear envelope and plasma membrane and form connections with adjacent cells .
C0007610
nucleus
C0028584
nuclear envelope