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 DOTAM and MECAM siderophores 2 and 4, TonB box peptides 5–10, and siderophore-peptide conjugates 11–34. The conjugates consist of a siderophore unit (Tx) that is linked via a covalent or a cleavable disulfide unit (Lx) to the N-terminus or the C-terminus of the peptide (aax). Bold amino acids in 5–10 indicate the amino acids composing the TonB box, and framing amino acids are depicted roman.
