spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Cleffmann, G.
Right arrow Articles by Seyfert, H. M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Cleffmann, G.
Right arrow Articles by Seyfert, H. M.

Journal of Cell Science, Vol 37, Issue 1 117-124, Copyright © 1979 by Company of Biologists

JOURNAL ARTICLES

Increase in macromolecular amounts during the cell cycle of Tetrahymena: a contribution to cell cycle control

G Cleffmann, WO Reuter and HM Seyfert

Increases in RNA, protein and cell size were determined cytophotometrically during the cell division cycle of Tetrahymena. For these parameters different patterns were found. RNA accumulates slowly during G1 period and faster during macronuclear S. This agrees with the changing uridine incorporation rate which is at least partly related to the varying macronuclear DNA amount. Increases in protein content and cell size occur mainly during G1 and G2. This pattern was confirmed by determining the RNA : protein ratio in individual cells. It is minimal at the end of the G1 period. These findings and evidence from the literature suggest that initiation of DNA replication is under negative control by the relative RNA content of the cell.




© The Company of Biologists Ltd 1979