Electron microscopy of crystalline micelles in cellulose elementary fibrils of Dictyostelium discoideum |
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Authors: | Robert P George Hans R Hohl |
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Institution: | (1) Department of Microbiology, University of Hawaii, Honolulu;(2) Pacific Biomedical Research Center, University of Hawaii, Honolulu;(3) Department of Bacteriology, University of Wisconsin, 53706 Madison, Wisconsin;(4) Cytological Laboratory, University of Zürich, Birchstraße 95, Zürich, Switzerland |
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Abstract: | Summary In negatively stained preparations the cellulose of Dictyostelium discoideum appears in the form of 35 Å wide fibrils of undetermined length. Upon mild acid hydrolysis a periodic pattern may be observed along the fibrils, in the form of fine, electron-dense bands across the full diameter of the fibril spaced apart from each other by electron-transparent segments approximately 100 Å long. We propose that the electron-transparent segments represent the crystalline micelles of the elementary cellulose fibril, whereas the electron-opaque bands represent the amorphous regions.Part of a thesis submitted by the senior author in partial fulfillment of the requirements for the Ph.D. degree, University of Hawaii. |
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