简并碱基符号对应表
| 简并碱基 | 含义 | 正常碱基 | 互补碱基 |
| R | puRine | A/G | Y |
| Y | pYrimidine | C/T | R |
| M | aMino | A/C | K |
| K | Keto | G/T | M |
| S | Strong | G/C | S |
| W | Weak | A/T | W |
| 简并碱基 | 含义 | 正常碱基 | 互补碱基 |
| R | puRine | A/G | Y |
| Y | pYrimidine | C/T | R |
| M | aMino | A/C | K |
| K | Keto | G/T | M |
| S | Strong | G/C | S |
| W | Weak | A/T | W |