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Nucleic Acids
| Symbol | N.A. | Description |
|---|---|---|
| A | A | adenine |
| C | C | cytosine |
| G | G | guanine |
| T | T | thymine |
| U | U | uracil |
| R | A or G | purine |
| Y | C or T (U) | pyrimidine |
| M | A or C | amino |
| K | G or T (U) | keto |
| S | C or G | strong (3 H bonds) |
| W | A or T (U) | weak (2 H bonds) |
| B | C or G or T (U) | not A |
| D | A or G or T (U) | not C |
| H | A or C or T (U) | not G |
| V | A or C or G | not T (U) |
| N | A or C or G or T (U) | any nucleotide |
| Structures of Nucleic Acids | |
|---|---|
| Adenine | Guanine |
| Cytosine | Thymine |
| Uracil | |
