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In the upper panel, transmission electron microscopy reveals a tangled mass of ~30nm diameter nuclear chromatin fibers when the contents of the nucleus from erythrocytes of the newt Notophthalmus viridescens were spread on a water surface, fixed with formaldehyde, critical point dried, and metal shadowed. The lower panel shows chromatin from the nucleated erythrocyte of the chicken dispersed in low ionic strength, high pH buffer, centrifuged through a sucrose-formaldehyde cushion onto a carbon film and stained with uranyl acetate. When fully dispersed, the 'beads-on-a-string nucleosomal organization of chromatin is clearly evident. Research Data Curation Program, UC San Diego, La Jolla, 92093-0175 (https://lib.ucsd.edu/rdcp) Ris, Hans; Olins, Ada; Fawcett, Don W. (2021). CIL:11828, Notophthalmus viridescens, Gallus gallus, erythrocyte. In Cell Image Library. UC San Diego Library Digital Collections. Dataset. https://doi.org/10.6075/J0QJ7G38
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