Fluorescent peptide nanoparticles, in every color of the
rainbow

The discovery of green fluorescent protein (GFP),
which is made by a jellyfish, transformed cell biology. It allowed
scientists to stitch the GFP sequence to proteins from other
organisms to trace their movements and interactions in living
cells. Now, researchers reporting in ACS Applied Materials &
Interfaces have designed peptide nanoparticles that can each glow
in a variety of colors, opening the door for many new biomedical
applications.