Search 200+ million predicted protein structures. Visualize, analyze sequences, and download structure files — completely free.
Amino acid composition, molecular weight, isoelectric point, hydrophobicity
Backbone dihedral angle visualization for structure validation
Side-by-side comparison of two protein structures
All 20 amino acids — properties, structures, and codes
Type "insulin" or "hemoglobin" — we find the UniProt ID automatically. Most tools only accept IDs.
Color by confidence, rainbow, secondary structure, residue type. Switch between cartoon, stick, and sphere views.
Visualize the molecular surface with transparency to see both surface shape and internal structure simultaneously.
Protein length, molecular weight, organism, gene name — all displayed alongside the 3D structure.
Full 3D protein viewer that works on phones and tablets. Most protein tools are desktop-only.
Download PDB and mmCIF files instantly, or open directly on AlphaFold's site for more details.
Primary, secondary, tertiary, quaternary — why each level matters for protein function and drug design.
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