Molecular Architecture

Engineering triple agonism: peptide sequence, acylation, and binding affinities

Engineered Precision

Retatrutide is not a natural peptide -- it is a 39-amino-acid chain designed from scratch by Eli Lilly's medicinal chemistry team. Every residue was chosen to activate three different receptor families simultaneously while a C20 fatty acid tail anchors it to albumin for once-weekly dosing. In this unit you'll see exactly how this molecular engineering translates into receptor-level potency.

Explore the Peptide Structure

Interact with retatrutide's 39-amino-acid chain to see how each region maps to a different receptor target.

interactive peptide structure

Knowledge Check

Test what you've learned about retatrutide's molecular design.

Practice Exercises

Reinforce your understanding.