when the combination of il-3 , a cytosolic fraction , and a membrane-containing fraction from proliferating cells was added to nuclei from nonproliferating cells , a burst of [ 3h ] thymidine incorporation into dna began after a 12-h lag period , attained a maximal rate at 16 h , and reached a level of 860 pmol thymidine/10 ( 6 ) nuclei at 24 h ( corresponding to replication of approximately 56 % total mouse genomic dna ) .
C1383501
cytosolic
C0007634
cells