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.
Noninvasively detectable expression over time. (A–C) and (E–G) were taken with a fundus camera. (D) and (H) were taken with a customized Nikon microscope system with GFP-specific filters and higher magnification. All photos were taken with a Swan-Jacob gonioprism. Arrows indicate fluorescence.
