Protein Analysis Tools

Free online protein tools: DNA translation, protein molecular weight calculator, codon table, isoelectric point prediction, and amino acid composition analysis.

DNA Translation Tool

Translate a DNA sequence into a protein using the standard genetic code, with all 6 reading frames and stop codon detection.

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Protein Molecular Weight Calculator

Calculate the molecular weight of a protein from its amino acid sequence (1-letter or 3-letter codes).

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Codon Table

Browse the standard genetic code table — all 64 DNA and RNA codons mapped to amino acids, with 1-letter and 3-letter codes.

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Protein pI Calculator

Calculate the isoelectric point (pI) of a protein from its amino acid sequence, with net charge at pH 7 and charged residue counts.

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Amino Acid Composition

Analyze the amino acid composition of a protein — count, percentage, and mass contribution of each residue.

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Protein Domains & Motifs

Predict transmembrane helices, hydropathy, signal peptides, coiled-coils and common motifs from an amino acid sequence.

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Enzyme Kinetics

Fit Michaelis-Menten kinetics with a Lineweaver-Burk plot — estimate Vmax and Km from substrate-rate data.

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Protein Structure Analyzer

Analyze a PDB, mmCIF or FASTA file: chains, sequences, secondary structure, molecular weight, pI and a hydrophobicity profile.

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