synchronized cells shifed to 40degreesc in the beginning of their g1 phase do not incorporate [ 3h ] -thymidine into dna during the expected s-phase , but once dna synthesis has been initiated ( approximately 10 hours after termination of serum starvation ) a shift to 40 degrees c no longer leads to an arrest of dna synthesis .
C0007634
cells
C0079395
g1 phase