Protein formation illustration

20 common naturally occurring amino acids are represented with colored circles. These join up to form a string of amino acids, that folds into a protein – a large molecule with a specific biological function.

Proteins — large molecules with a specific biological function — are created by stringing together smaller molecular building blocks (amino acids) into chains which fold into complex 3D shapes. 

Date:
30 March 2026
Credit:
Johan Jarnestad/The Royal Swedish Academy of Sciences
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