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.
Electron micrographs of the highly purified plant-produced norovirus (NoV) (A) GI.4 VLPs, (B) GII.4-2006a VLPs, (C) recombinant RV VP6 protein and (D) a mixture of the aforementioned examined by transmission electron microscope EM900 (Carl Zeiss Microscopy, Germany) following negative staining with 2% uranyl acetate. The black bar corresponds to 100 nm.
