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.
Fluorescence titration of ulbactin F (1) with (A) iron chloride and (B) copper chloride. (C) Metal selectivity of 1, measured on a log scale as the ratio of fluorescence of free ligand over fluorescence of ligand in the presence of one molar equivalent of metal. (D) Free energy minimization of proposed 1-Fe3+ structure.
