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 sequences)

FASTA

Click to upload or drag and drop

FASTA file (.fasta, .fas, .fa, .txt)

Max size: 50MB

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

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

Amino acid composition

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