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.
Time-dependent change of three-dimensional culture at a density of 2.6×104 cells/cm2. Microscopic images at 0 (A), 2 (B), 4 (C), and 6 days (D) are shown. From a single cell (A), elongation occurred to generate structures (B and C), and finally complex structures were observed (D). Scale bars, 100 µm.
