DNA white rotate clip.  DNA is made up of four building blocks called nucleotides, which are abbreviated as A, C, G, and T. The order of these nucleotides in a DNA molecule forms a code, known as the DNA sequence, that specifies the instructions for building and maintaining an organism. These instructions are read and used by the cell to make proteins, which are the building blocks and workhorses of the cell. Polymime is a animation company offering royalty free medical stock images and medical stock videos. Other services including 3D rending, interactive 3D, vfx and more.