Sequence Input

Paste a one-letter amino-acid sequence or FASTA. Header lines are ignored automatically.

Examples

Embedded from PDB FASTA records so the app remains offline after loading.

Teaching Focus

Try switching enzymes after loading chymotrypsin, or drag the hydropathy window to see local residue chemistry smooth into broader sequence regions.

Myoglobin 1MBO

Sequence length and core physical properties are calculated in the browser.

Hydropathy

Positive Kyte-Doolittle values trend hydrophobic; negative values trend hydrophilic.

Charge vs pH

The curve crosses zero near the theoretical pI, where net charge is balanced.

Amino-Acid Composition

Peptide Digestion

Missed cleavages are fixed at 0 for this version.

# Residues Sequence Length Mass pI Charge pH 7 GRAVY