We have previously reported oscillations in the activities of the phosphoamino acid phosphatases in murine erythroleukaemic cells. In keeping with our predictions we now show that the phosphotyrosine phosphatase activity rhythm has a much shorter period than originally seemed the case, being of the
DISTINCT, VERY HIGH FREQUENCY OSCILLATIONS IN THE ACTIVITY AND AMOUNT OF ACTIVE ISOZYME OF LACTATE DEHYDROGENASE IN MURINE ERYTHROLEUKAEMIC CELLS AND A CELL-FREE SYSTEM
✍ Scribed by G.M.N. FERREIRA; K.D. HAMMOND; D.A. GILBERT
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 347 KB
- Volume
- 20
- Category
- Article
- ISSN
- 1065-6995
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✦ Synopsis
Electrophoretic and kinetic determinations of the activity of lactate dehydrogenase in murine erythroleukaemic (MEL) cells, sampled at 1 min intervals, reveal distinct oscillations in the activity and amount of active isozyme. Both oscillations have periods in the range of 2-6 min (probably less) and both appear to be rhythmically modulated with respect to period, amplitude and mean. The oscillations also occur in cell-free systems, a fact which throws doubt on the value of studies where it is assumed that such preparations have constant composition.
1996 Academic Press Limited K: oscillations; lactate dehydrogenase; isozyme; murine erythroleukaemia.
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