. Cytology. Cytology. presumably in part DNA helices. So far as we are aware the only inter- pretation of electron micrographs which attempts to tie together the submicroscopic picture with that revealed by the light microscope is the. mm Of 2 «tcw(88/tuf 3W SOMATIC mAPHKSi cmomum S^ratlon i$ possflMe in s^h « 3 oniers * coHing. •W»l Argenrw Nstiowl l*. i^jg Figure 7-5. Model of Two Microfibrillae Showing Three Levels of Coiling in a Somatic Metaphase Chromosome. (From Nebel, B. R., 1960. "On the Structure of Mammalian Chromosomes During Spermatogenesis and After Radiation, with Special R
. Cytology. Cytology. presumably in part DNA helices. So far as we are aware the only inter- pretation of electron micrographs which attempts to tie together the submicroscopic picture with that revealed by the light microscope is the. mm Of 2 «tcw(88/tuf 3W SOMATIC mAPHKSi cmomum S^ratlon i$ possflMe in s^h « 3 oniers * coHing. •W»l Argenrw Nstiowl l*. i^jg Figure 7-5. Model of Two Microfibrillae Showing Three Levels of Coiling in a Somatic Metaphase Chromosome. (From Nebel, B. R., 1960. "On the Structure of Mammalian Chromosomes During Spermatogenesis and After Radiation, with Special Reference to Cores," in "Fourth Intern. Conference on Electron ; Springer-Verlag, Fig. 1, p. 228. Courtesy of Dr. B. R. Nebel, Argonne National Laboratory.) one offered by Nebel (1959-60). Essentially his model consists of a hierarchy of three levels of coiling, including the minor coil (Figure 7-5). The question of the reality of the minor coil, however, is still open, with THE CHROMOSOME COILING CYCLE / 171. 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 Wilson, G. B. (George Bernard), 1914-; Morrison, John H. (John Herbert), 1927-. New York, Reinhold
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