Illustrated Glossary of Organic Chemistry
compaction (to require less space) by coiling of the double
. A variety of supercoil
Twisting the DNA
is just one way in which supercoiling can occur.
phone cord helix is about 1 meter long.
the phone cord wad is only 10 cm diameter.
A wadded phone cord as a metaphor for DNA
supercoiling. When stretched out, the phone cord has a helical
structure, but is quite long. It occupies less space when wadded
into a ball.