## Abstract Glycosaminoglycans (GAGs) were released by trypsin from the surface of cultured mouse cells (3T3) in two different growing states: during logβgrowth phase and during resting due to serum starvation. Doubly labelled molecules from resting cells were compared with those from growing as we
Cell cycle dependent modulations of the surface membrane of normal and SV40 virus transformed 3T3 cells
β Scribed by L. A. Smets; L. De Ley
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- English
- Weight
- 479 KB
- Volume
- 84
- Category
- Article
- ISSN
- 0021-9541
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β¦ Synopsis
Abstract
Agglutinability with Concanavalin was studied as function of cell cycle transition in normal and SV40 virus transformed 3T3 cells. In synchronized cultures of normal cells, agglutinbility was high during mitosis and disappeared rapidly. Agglutinability of transformed cells remained high in G~1~ phase but diminished gradually upon entering S phase and reached minimum in G~1~ phase. Decreased agglutinability a the end of the cell cycle was also observed in synchronous SV3T3 cultures by a combined technique of haemadsorption and density gradient centrifugation. In normal 3T3 cells, similar variations in agglutin ability during interphase could not be observed.
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T h e phosphorylation of specific plasma membrane proteins appears to serve a significant role in cellular growth control. We have shown that t w o proteins, p14 and Abbreviations used: CAMP, 3',5'-cyclic monophosphate: SDS, sodium dodecyl sulfate; SS, smooth surface tumorigenesis.
## Abstract The growth of SV3T3 cells in medium containing a low concentration (0.20% v/v) of normal calf serum is enhanced by the addition of biotin or certain unsaturated fatty acids. The biotin effect on the final viable cell density is 5β to 10βfold over the control and is extremely potent, exe
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