Cell-cycle-regulated expression of thymosin beta sub(4) in thymocytes

Cell-cycle-regulated expression of thymosin beta sub(4) in thymocytes

Thymosin beta sub(4) belongs to a family of ubiquitous peptides present at a high cellular content but still with an unknown intracellular function. The expression of this peptide was studied in concanavalin-A-stimulated, proliferating rat thymocytes during cell cycle progression. An early, transien...

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Veröffentlicht in:European journal of biochemistry 1991-01, Vol.199 (2), p.257-262
Hauptverfasser: Schoebitz, B, Netzker, R, Hannappel, E, Brand, K
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container_title European journal of biochemistry
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creator Schoebitz, B
Netzker, R
Hannappel, E
Brand, K
description Thymosin beta sub(4) belongs to a family of ubiquitous peptides present at a high cellular content but still with an unknown intracellular function. The expression of this peptide was studied in concanavalin-A-stimulated, proliferating rat thymocytes during cell cycle progression. An early, transient 10-fold increase of the peptide occurred 1 h after stimulation without elevation of the corresponding mRNA level. This increase coincided with that of thymosin beta sub(4) biosynthesis. The sharp decline of the thymosin beta sub(4) content was not due to a secretion of the peptide into the medium. During S phase and mitosis, the biosynthetic rates as well as mRNA content, but not the cellular thymosin beta sub(4) concentration, increased again. After 96 h of culture the values returned to those of quiescent cells.
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title Cell-cycle-regulated expression of thymosin beta sub(4) in thymocytes
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