Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Localization of NORs on spread chromosomes of human lymphocytes by confocal microscopy. In situ hybridization of rDNA genes (A and B) and Ag-NOR staining (C and D). DNA is stained red with propidium iodide. The specific labeling, in blue, appears on acrocentric chromosomes as pairs of dots symmetrically arranged (A and C) or as one elongated structure transversally oriented relative to both chromatids (B and D). Bar, 1 μm.
