The image shows a nucleus isolated from Arabidopsis thaliana immunostained for the HDA6 histone deacetylase (red). DNA is stained blue. HDA6 concentrates in the nucleolus (top center), where ribosomal RNA genes reside.
Biological Process: Regulation of gene expression, epigenetic, Nucleus organization
See K. Earley et al. 2006 Erasure of histone acetylation by Arabidopsis HDA6 mediates large-scale gene silencing in nucleolar dominance. Genes Dev. 20:1283-1293.
Author: Craig Pikaard
Source: The Cell: An Image Library