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.
(a) Siderophores biosynthesized by prokaryotes that contain one or more citric-acid-derived building blocks (highlighted in red). (b) Proposed pathway for achromobactin biosynthesis highlighting the reactions catalyzed by AcsD. (c) Reactions of citric acid with l-serine and analogues catalyzed by AcsD, resulting in amides and ester (and thioester) derivatives of citric acid.
