GATTACA (1997)- is composed entirely of the letters used to label the nucleotide bases of DNA.

Vincent Freeman (Ethan Hawke) has always fantasized about traveling into outer space, but is grounded by his status as a genetically inferior "in-valid." He decides to fight his fate by purchasing the genes of Jerome Morrow (Jude Law), a laboratory-engineered "valid." He assumes Jerome's DNA identity and joins the Gattaca space program, where he falls in love with Irene (Uma Thurman). An investigation into the death of a Gattaca officer (Gore Vidal) complicates Vincent's plans. The name "Gattaca" is composed entirely of the letters used to label the nucleotide bases of DNA. The four nitrogen bases of DNA (deoxyribonucleic acid) are adenine, thymine, cytosine, and guanine.