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Page 1 \ ?^p 6r.1 CELL CYCLE CONTROL OF HUMAN H4 ...

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at F: c.n cyd. contol ol Ha a&. f@crlN@<br />

n9.2. Fagulallon ot hldone <strong>H4</strong> g€ne expt$3lon. Oop PansD<br />

Sch€matic reprosentation ol lhe c€ll cycle Gr, S, G?, Mitosis,<br />

lndicaling lh6 pahway 6ssociat6d wirh lh€ poBrp.olif€rariv€<br />

ons€t ol difer€nliatoo initiel€d bllowing comple on of mihcsis.<br />

(Low€r Pan€D Repre3€ntation ol data dslining rh€ pdncipal<br />

biocbmical parafi€lors ot histons gen€ oersssioni hislon€<br />

p|ol6in synih€sis and th€ pr€s€nc€ ol histon€ mRNA ar8<br />

r$ticl6d to S phas€ c€lls (DM synlh€sis). Conslilulive<br />

transcriAion ol hision€ 96nas occu6 lhroughout th6 c8ll cycl€<br />

wilh an enhanc€d transcdploml l€vel dudng 33 y S phase.<br />

Thes€ . r€sults ssiablish th€ cornttn€d contribution of<br />

transcription and mBNA stability !o the s phas€-specilic<br />

r8gulslion ol histone lrc3ynlhasis in prolileraling cells, with<br />

histone mnl,|A l9v6b as th6 ralo limiung step.

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