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

https://bravo-wiki.win/index.php/Why_Are_So_Many_Hormones_Peptides%3F_Exploring_the_Language_of_Cellular_Communication

Peptides are small proteins that act like messengers, sending signals between cells by binding to specific receptors. Researchers study how peptides interact with these receptors to understand selectivity and signaling pathways