TITLE

Subphases of DNA Replication in Drosophila Cells

AUTHOR(S)
Rehak, Marian; Csuka, Ildiko; Szepessy, Edit; Banfalvi, Gaspar
PUB. DATE
October 2000
SOURCE
DNA & Cell Biology;Oct2000, Vol. 19 Issue 10, p607
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Exponentially growing Drosophila S2 cells in suspension culture were synchronized at low- and high-resolution centrifugal elutriation, and DNA synthesis was measured by [[sup 3]H]-thymidine incorporation throughout the S phase. At low resolution, one repair peak at the G[sub 1]/G[sub 0] border and two replication peaks known as early and late S subphases were observed. At high resolution, six chronologic compartments were distinguished. The distribution of these peaks indicated one repair peak at 2.05 C value, one minor replication peak at 2.43C, and four major subphases of replication corresponding to 2.64C, 2.89C, 3.32C, and 3.60C, representing 6.7%, 3.4%, 15.3%, 20.4%, 32.1%, and 22.0% of the synthetic activity, respectively. The five major peaks of cell growth with 2.32C, 2.56C, 2.85C, 3.18C, and 3.58C values consistently preceded those of replication subphases.
ACCESSION #
5322855

 

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