Amino acid composition

Analyze the amino acid composition of protein sequences. Upload a FASTA file or paste your protein sequences below to get the amino acid composition breakdown.

Input (Protein sequence or PDB structure)

Fetch by PDB ID:

Output options

Amino acid format

One-letter codes

A, R, N, D, C, E, Q, G...

Three-letter codes

Ala, Arg, Asn, Asp, Cys, Glu, Gln, Gly...

Sort by

AscendingDescending

Include percentages(show percentage of each amino acid)Show amino acids with zero counts(display all 20 standard amino acids)

Amino acid composition report

Amino acid composition results will appear here automatically.

Enter a protein sequence above to begin.

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