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.
Size exclusion chromatography of recombinant HA63-286-RBD. The isolated HA receptor-binding domain elutes as a well-folded monomer (labeled black peak) with an apparent molecular size of ∼25 kDa compared to molecular size standards (labeled gray peaks) on a Superdex 200 size exclusion chromatography column. The purified peak was collected and yielded well-diffracting crystals. Abs, absorbance.
