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.
Molecular structures of amphotericin B, nystatin A1, heptaene nystatin derivatives S44HP and BSG005, and their analogues generated by genetic engineering. Red circles indicate chemical modifications relative to nystatin A1, and the corresponding mutations are given under the respective molecule names.
