Chromatin Packing

Question 1

What are the levels of packing from smallest to largest?

Answer 1

1. Nucleosomes
2. Fibers
3. Looped Domains
4. Heterochromatin
5. Highly Condensed

Question 2

How long are fibers?

Answer 2

30-nm chromatin fibers

Question 3

What are looped domains?

Answer 3

attached to non-histone proteins

Folding of cf averaging 50-100 Kb

Question 4

What are heterochromatin?

Answer 4

further folding and packing, show up as dark spots in micrographs

Question 5

what are euchromatin?

Answer 5

loosely packed, diffuse

Question 6

highly condensed?

Answer 6

very highly condensed heterochromatin