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.
Analysis of H7N9 HA‐triggered cell‐cell fusion. Immunofluorescence staining of H7N9 HA without protease treatment and with trypsin and matriptase/ST 14 treatment. Single cells and syncytia‐forming cells are emphasized with a white dashed line. H7N9 HA was labeled with a specific 1st HA antibody and a secondary Alexa Fluor 488 antibody. Nuclei were stained with DAPI. Magnification of the images is 25×
