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.
Prodomain–GF swapping. A–C, straitjacket, arm domain, and GF connectivity in pro-TGF-β1 (A), pro-activin A (B), and pro-BMP9 (C). Straitjacket, arm, and GF elements are shown in the same color if they belong to the same precursor monomer; elements are numbered 1 or 2 according to their monomers. They are labeled 1 or 2 when the monomer from which they are derived is unknown and are given a distinctive color (straitjackets in pro-TGF-β1 and GFs in pro-BMP9).
