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  • bases
  • Two of DNA's four bases, cytosine and adenine, can be methylated. (wikipedia.org)
  • It is represented mathematically as follows: GC skew = (G - C)/(G + C) AT skew = (A - T)/(A + T) Erwin Chargaff's work in 1950 demonstrated that, in DNA, the bases guanine and cytosine were found in equal abundance, and the bases adenine and thymine were found in equal abundance. (wikipedia.org)
  • DNA and RNA molecules are each written in a language using four "letters" (four nucleotide bases), but the language used to construct proteins includes 20 "letters" (20 different amino acids). (wikipedia.org)
  • found
  • Mutations in the CTP synthase have been seen to confer resistance to cytotoxic drugs such as cytosine arabinoside (ara-C) in a Chinese hamster ovary (CHO) cell model of leukemia though such mutations were not found in human patients with ara-C resistance. (wikipedia.org)