An official website of the United States government
Here's how you know
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.
Structures of the class A macrophage SR. (a) Domain organization of type I and type II receptors. Extended (b) and compact (c) forms of soluble receptor have been seen by rotary shadowing and negative staining (8). Adapted, with modifications from refs. 8 and 37 (3).