As far as I know, chromatin consists of two kinds:
Heterochromatin is more condensed so translational factors have less access to this region, and this region is poor in GC.
Euchromatin is less condensed so translational factors have more access to this region, and this region is rich in GC.
I wonder how GC content affects the condensation status of the chromosome? What is the mechanism behind this relationship?
It is well known that GC and AT pairs differ in the number of their hydrogen bonds. Does this hydrogen bonding play the key role in condensation of chromosomes?