German artist Daniel Becker has converted the DNA sequence of various genes into works of art by representing each of the bases in the DNA code - A, C, G, T - graphically. The project, which he calls VISUAL DNA, results in colorful graphic designs. The original art installation involved a series of test tubes that contained different DNA samples - tarantula, human, mold, etc. Each tube had a bar code, which, when scanned, caused the artwork based on its sequence to be projected. See, for example, the image at left which is based on goldfish DNA.
While the original artwork isn't for sale, you can purchase t-shirts with the designs.