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.
Stereo view of the trHbO subunit tertiary structure (orange ribbon) overlaid onto trHbN (green trace). Individual α-helices are labeled for trHbO. The figure includes mesh surfaces defining the trHbO protein matrix cavities (red color), and the matrix tunnel identified in trHbN (blue color).
