The base pairs in DNA include: adenine – thymine and guanine – cytosine in DNA. (TNG: "Unnatural Selection" ) In 2153, Doctor Phlox analyzed the genetic profile of the Xindi finger Jonathan Archer was given by the alien foreman of the trellium mining planet. From his analysis, he found that the DNA was "nearly identical to the tissue samples taken from the corpse found on Earth. Their base pair sequencing is far closer than, say, Humans and chimpanzees. Nearly identical, but not quite." Learning this, Archer suggested they were more "like Humans and Neanderthals." (ENT: "The Xindi")