When DNA is compacted by histones into 10-nm and 30-nm fibers, the DNA is unable to interact with proteins required for gene expression. Therefore, to allow for these proteins to act, the chromatin must constantly alter its structure. Which processes contribute to this dynamic activity?
A) DNA supercoiling at or around H1
B) methylation and phosphorylation of histone tails
C) hydrolysis of DNA molecules where they are wrapped around the nucleosome core
D) accessibility of heterochromatin to phosphorylating enzymes
E) nucleotide excision and reconstruction
The importance of histones and scaffolding proteins in the compaction of eukaryotic chromosomes.
Characteristics of Muscle Fibers
Patients unable to stand may be weighed using a chair scale.
The structure of collagen fibers
Acetylation of core histones
Most Plant Foods Contain Both Soluble and Insoluble Fibers