Nitrogenous base
Nitrogenous bases are organic compounds that owe their basic properties to the
lone pair of
electrons of a
nitrogen atom. Typical nitrogenous bases are
ammonia (NH3),
triethylamine,
pyridine, and the
nucleobases adenine,
guanine,
thymine,
cytosine, and
uracil. Nitrogenous bases can be classified under two groups: purines (A and G) and pyrimidines (C, T, and U). These bases make up a crucial part of both deoxyribonucleotides and ribonucleotides, and the interactions between Adenine/Thymine and Guanine/Cytosine are the basis for the universal genetic code. Uracil replaces Thymine in RNA. For the structure and list of purines see this link:
http://upload.wikimedia.org/wikipedia/en/5/5d/Purines.png For the structure and list of pyrimidines see this link: Chemical structure of thymine Chemical structure of uracil Chemical structure of cytosine Thymine Uracil Cytosine
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Base nitrogenada
Base nitrogenada
nitrogenous base
nitrogenous compound 氮化合物
nitrogenous base
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