Kuwait-University-Journal-of-Law-header
Search
Kuwait Journal of Science

Previous Issues

Advance Search
Year : From To Vol
Issue Discipline:
Author

Volume :6 Issue : 1 1979      Add To Cart                                                                    Download

The phosphate and polyphosphate content of Dictyostelium discoideum cells during their growth and subsequent differentiation

Auther : HAD1 AL-RAYESS, JOHN M. ASHWORTH AND MAYSOON S. YOUNIS

Department of Biology, University of Essex, Colchester, U.K.

 

ABSTRACT

 

The intracellular phosphate concentration decreases markedly during differentiation and this decrease is unaffected by the growth conditions of the myxamoebae. Paralleling the decrease in total phosphate there is, in cells containing a high initial glycogen content, a decrease in intracellular orthophosphate. Cells not containing a high initial glycogen content show little or no change in intracellular orthophosphate until terminal stages of differentiation, when this pool rises. Since both sets of cells undergo the same morphogenetic sequence, it is unlikely that changes in intracellular orthophosphate regulate the nature of the developmental processes. Cells containing a high glycogen content initially have larger amounts of polyphosphate than those containing a low glycogen content, and whereas there is a net decrease in polyphosphate during the differentiation of the former cells there is a net increase in polyphosphate content of the latter. This makes it unlikely that the metabolic energy derived from glycogen oxidation is used to synthesise polyphosphate whose metabolic role is likely therefore to be as a phosphate store, not an energy store.

Kuwait Journal of Science
Journal of Law

You are Visitor No.

55621

Journal of Law
Journal of Law
Tell your friendsJournal of Law
Journal of Law

Last Updated

Jun 19, 2012

Journal of Law
Journal of Law
Journal of Law

Please enter your email Here to receive our news

Journal of Law