Biology / Unit 4 Bio 0839 short lesson, about 20 seconds
Chromatin Compaction: the Nucleosome
Captions available
The idea
A nucleosome is the first level of chromosome compaction, formed as DNA wraps around a core of eight histone proteins, shortening the DNA strand roughly sevenfold.
In practice
A stretch of DNA wrapping twice around a histone core forms one nucleosome, connected to the next by a short stretch of linker DNA.
Where people slip
This packaging shortens the DNA physically without removing or altering its sequence.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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