serum-deprived ( 0.2 % ) resting nih 3t3 mouse fibroblasts preincubated with cycloheximide ( 7.5 micrograms/ml ) were fused with stimulated cells taken 10 hours after changing the medium to the one containing 10 % serum , and dna synthesis was investigated in nuclei of heterodikaryons , homodikaryons , and monokaryons , using radioautography with double-labeling technique .
C0007634
cells
C0007610
nuclei