FIG. 1.
Structure of squid melanin proposed by Nicolaus et al. (47). Rings are aromatic. Each pair of o-oxygen substutituents can exist as either quinone, hydroquinone, or semiquinone groups.
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.