Animal Biotechnology

PURINES AND PYRIMIDINES

• The nitrogenous bases fall in to two types.
• Purines
  • Any of a group of organic compounds containing two fused rings of carbon and nitrogen atoms. One ring has six members, the other has five, and each has two nitrogens.
• Pyrimidines
  • Heterocyclic organic compound (C4H4N2).  It  including uracil, cytosine, and thymine