
Protein Structure
3D illustration depicting the four types of structures that make up the shape of a protein. In the image a, the primary structure is shown as the sequence of amino acids that make up the polypeptide chain. In image b, the secondary structure, which can take the form of an alpha-helix or a beta-pleated sheet, is shown to be maintained by hydrogen bonds between amino acids in different regions of the original polypeptide strand. Labels are included for alpha-helix, pleated sheets, and bonds. In image c, the tertiary structure is shown as a result of further folding and bonding of the secondary structure. In image d, the quaternary structure occurs as a result of interactions between two or more tertiary subunits. The example shown is hemoglobin. Labels are included for heme units and hemoglobin.
Credit
Blausen Medical
Dimensions
1920 x 1920 pixels
Print Size @ 300 dpi
6 x 6 inches / 16 x 16 cm