Peptide Playground

Name-to-Peptide Studio

Enter a name or surname and this app will map each letter to a standard amino-acid code, calculate the peptide formula, and render a 2D structure formula and 3D preview in the browser. This is a visual tool created for biochemistry students; it is not designed to be an accurate scientific source nor an experimentally final structural representation.

Fallback Rule

If a letter is not a standard one-letter amino-acid code, the app swaps it for the closest standard code alphabetically.

Generate a Peptide

Names with spaces, accents, and punctuation are cleaned automatically.

Try an example:
7.00

Estimates charge using pKa values from Lehninger Principles of Biochemistry. Includes N-terminus, C-terminus, and ionizable side chains.

Sequence Summary

The peptide and its formula update each time you generate a new sequence.

Length 0 residues
Substitutions 0
Molecular Weight 0.00 Da
Average Charge 0.00 @ pH 7.00
Normalized input

No sequence yet

One-letter peptide

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Three-letter peptide

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Chemical formula

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Amino acids used Properties sourced from Lehninger Principles of Biochemistry

2D Structure Formula

Drawn from the peptide sequence as a standard skeletal structure diagram.

Generate a peptide to see the 2D structure formula here.

This is a normal peptide line drawing generated from the sequence. It is meant to show the structural formula, not conformational stability.

3D Preview

Loads an RDKit-generated molfile so bond connectivity comes from the peptide chemistry instead of guessed distances.

Model source

Waiting for sequence

Bonding

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3D Color Scheme
Generate a peptide to see which colors match which elements.
Generate a peptide to see the modeled 3D structure here.

This preview uses RDKit-generated atom and bond data for correct connectivity. This is a chemistry study view, not a minimized peptide fold or a protein-structure prediction. Hydrogens are not rendered in this 3D viewer so the backbone and side-chain connectivity stay easier to inspect.