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Classification of Nucleotides
| Angle of View | Attribute | Nucleotides |
|---|---|---|
| (1) Ring structure | purine | A, G |
| pyrimidine | C, U | |
| (2) Functional group | amino | A, C |
| keto | G, U | |
| (3) Hydrogen bonding | stronger | C, G |
| weaker | A, U |
See Local Features of Individual Nucleotides for further explanation.
