Peptide builder
Free, no sign-up. It runs in your browser on Athanor’s own engine, and your structures never leave your device.
How to do it
Type the amino acids in one-letter codes, N to C.
Athanor draws the peptide, every residue and amide bond.
Copy the SMILES, or download a MOL file or an SVG.
How it works
Athanor joins the residues with amide bonds from the N-terminus to the C-terminus and draws the backbone in the zigzag a textbook uses, side chains below and above. Stereocenters are the natural L forms. The formula and molar mass are for the neutral peptide.
Questions
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Runs in your browser. No account needed to draw.