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SMARTR - Math/Science Virtual Learning Experiences for Youth
Posted by Kim Lightle on September 24, 2013 at 1:30pm
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A model of extended chromatin in which nucleosomes (red beads) are widely spaced on a segment of DNA (tubes). Loose packing yields much more irregular structure than observed in a model of condensed chromatin. In either structure, nucleosomes that are particularly stable (that is, have a strong preference for a particular sequence location) can alter the overall placement of nucleosomes and the structure of chromatin.
Image credit: Thomas C. Bishop, Depts. Chemistry and Physics, Louisiana Tech University