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.
(A) A mitotic cell with chromosomes clearly visible aligned at the metaphase plate. (B) The same cell with the chromosomes in the center of the metaphase plate exhibiting two-photon fluorescence during exposure to the 1.06-μm-wavelength laser beam focused through the ×63 microscope objective. Cells were exposed to ethidium monoazide bromide at 10 μm/1 ml for 24 h. (Bar = 15 microns.)
