Structural studies of glycerinated skeletal muscle. I. A-band length and cross-bridge period in ATP-contracted fibers.

Abstract

An electron microscope study is reported of structural changes during ATP-induced contraction of glycerinated rabbit psoas. In the absence of ATP, A-band length is constant at sarcomere lengths above 1.9 micron, with average length of 1.54 mu. In ATP-treated fibers, A-band length is also constant at sarcomere lengths above 2.0 microns, but the apparent… (More)

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