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The top 10 most discriminating 4-mer sequences found within promoter and non-promoter region for plant
| Rank | Frequency Difference | 4-mer |
| 1 | 564 | TATA |
| 2 | 438 | ATAT |
| 3 | 435 | AAAA |
| 4 | 431 | ATAA |
| 5 | 407 | TAAA |
| 6 | 373 | GAAG |
| 7 | 324 | TTTT |
| 8 | 312 | ATAA |
| 9 | 302 | AGAA |
| 10 | 302 | GGAA |
