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  • Title: Synthesis of histone messenger RNAs by RNA polymerase II in nuclei from S phase HeLa S3 cells.
    Author: Detke S, Stein JL, Stein GS.
    Journal: Nucleic Acids Res; 1978 May; 5(5):1515-28. PubMed ID: 662692.
    Abstract:
    Nuclei were isolated from synchronized HeLa S3 cells and transcribed utilizing their endogenous RNA polymerases. Our data suggest that S phase nuclei are capable of synthesizing histone mRNA sequences while nuclei from G1 phase cells are not. Transcription of histone mRNA sequences by S phase nuclei can be abolished completely by low levels of alpha-amanitin (1.0 microgram/ml, a concentration which completely inhibits RNA polymerase II). From these results it appears that transcription of the histone mRNA sequences occurs during the S phase but not during the G1 phase of the cell cycle and that RNA polymerase II is responsible for histone gene readout.
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