. Cell chemistry; a collection of papers dedicated to Otto Warburg on the occasion of his 70th birthday. Warburg, Otto Heinrich, 1883-; Biochemistry. OBSERVATIONS ^i We want to illustrate our findings by the Figs. 1-4. Fig. i shows the muscle at its equilibrium length to which it contracts elastically if cut out. This equilibrium length is about 20°o shorter than the rest-length at which the muscle is suspended in the animal. At the equilibrium length no tension exists and thus we can expect to find the elastic elements comp- letely unextended. The two narrov/ dark lines to- wards the top and
. Cell chemistry; a collection of papers dedicated to Otto Warburg on the occasion of his 70th birthday. Warburg, Otto Heinrich, 1883-; Biochemistry. OBSERVATIONS ^i We want to illustrate our findings by the Figs. 1-4. Fig. i shows the muscle at its equilibrium length to which it contracts elastically if cut out. This equilibrium length is about 20°o shorter than the rest-length at which the muscle is suspended in the animal. At the equilibrium length no tension exists and thus we can expect to find the elastic elements comp- letely unextended. The two narrov/ dark lines to- wards the top and the bottom in Fig. I are Z membranes, lying two microns apart. The broad andlighter segments adjoining these membranes are the I-bands. The broad darker segment towards the middle of the sarcomer is what is usuahy called the A-band. In the middle of the sarcomer there is a fainter dark line, the M membrane, delineated on either side by the lighter, less dense, and narrow H-band. The space between the H-band and the I-band is filled with material of uniform density. The muscle can be stretched elastically from its equilibrium length to its rest-length References p. 133. S*. 1. Explanation m Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Burk, Dean. Amsterdam, Houston, Elsevier Pub. Co.
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