Peptides are small molecules that act like messengers, sending signals between...

https://www.acid-bookmarks.win/peptides-are-tiny-chains-of-amino-acids-that-cells-use-to-send-messages

Peptides are small molecules that act like messengers, sending signals between cells by binding to specific receptors. Researchers use peptides to explore how receptors work, how selective they are, and which signaling pathways they trigger