It is small enough that you can display all of the atoms and still have a picture that is not too confusing. This structure, like many other insulin structures, includes a hexameric complex of the hormone, and only one monomer (composed of one A-chain and one B-chain) is shown here. In the structure, you can see many of the key features that stabilize protein structure. Carbon-rich amino acids, like leucine and isoleucine, cluster in the middle of the molecule, forming a hydrophobic core, and the surface is covered with charged amino acids like arginine and glutamate that interact favorably with the surrounding water. Also notice the three disulfide bridges between…