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.
Immunohistochemical staining for acetylated tubulin in tracheae of mice exposed or not exposed to smoke for 12 months. Cilia (green) are present at 12 months in mice not exposed to smoke (left column). After 12 months of smoke exposure, immunofluorescence images reveal a loss of cilia (right column). Lower images depict enlargements of boxed sections indicated in corresponding top images.
