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.
Observation of A549 cells. (A) A549 cells in the control group were polygonal. Magnification, ×200. (B) A549 cells rapidly underwent a morphological change, following culturing in the presence of 10 ng/ml transforming growth factor-β1 for 7 days. Magnification, ×200.
