'Forest of Rods', 1960.
© Science Museum / Science & Society Picture Library
A model of myoglobin constructed during work on the structure of the molecule to a resolution of 2 angstroms. It comprises steel rods with meccano clips in wooden base-boards with Kendrew-type skeletal models showing the peptide chain. Myoglobin is a protein that stores oxygen in muscles. John Kendrew and Max Perutz used a series of electron density maps of myoglobin to create this three-dimensional model which provided vital information on how myoglobin functions in the body.