Myofibrils which lengthen by several per cent in the presence of ATP and magnesium ions were prepared by teasing indirect flight muscle of Drosophila in solutions containing ethylenediaminetetraacetate. A study was made of the hydrogen ion, magnesium ion, ATP, and potassium chloride concentrations with which this effect could be observed. The lack of elongation with pyrophosphate and several nucleoside triphosphates suggests that the lengthening is ATP specific. A relaxing factor system comparable to that described for rabbit muscle was not demonstrable, as elongated fibrils did not shorten with calcium ions, carnosine, or digitonin.
Article| April 01 1962
THE ELONGATION OF MYOFIBRILS FROM THE INDIRECT FLIGHT MUSCLE OF DROSOPHILA
From the Department of Biology, University of Rochester, New York.
Dr. Aronson's present address is Department of Cytology, Dartmouth Medical School, Hanover, New Hampshire
Received: October 13 1961
Online Issn: 1540-8140
Print Issn: 0021-9525
Copyright © 1962 by The Rockefeller Institute Press
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John Aronson; THE ELONGATION OF MYOFIBRILS FROM THE INDIRECT FLIGHT MUSCLE OF DROSOPHILA . J Cell Biol 1 April 1962; 13 (1): 33–41. doi: https://doi.org/10.1083/jcb.13.1.33
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