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.
Sphere formation assay from UTSCC9 and UTSCC90. (A) Sphere formation of ALDH1high cells after cultivation in serum-free cell culture medium. (B) After ALDH1high, ALDH1low and parent 5×103 cells were cultured in 6-well ultra-low attachment dishes, total number of spheres per well was counted. The horizontal bars represent the mean expression levels; *P<0.05, **P<0.01, by unpaired t-test.
