Table 1.
AA/TT contents and gene transcription levels
| AA/TT content | AAAA/TTTT content | ||||||
|---|---|---|---|---|---|---|---|
| Level | Range of level (in log2) | Entry-to-dyad | Exit-to-dyad | Ratio | Entry-to-dyad | Exit-to-dyad | Ratio |
| No_trans | (0, 2] | 81 | 67 | 1.21 (0.3) | 68 | 66 | 1.03 (0.93) |
| Low | (2, 4] | 368 | 257 | 1.43 (2.6 × 10−2) | 322 | 212 | 1.52 (1.7 × 10−2) |
| Medium | (4, 6] | 531 | 348 | 1.53 (2.0 × 10−3) | 457 | 299 | 1.53 (4.1 × 10−3) |
| High | (6, +∞) | 287 | 144 | 1.99 (5.7 × 10−4) | 245 | 131 | 1.87 (3.3 × 10−3) |
The transcription levels of yeast genes have been measured in a previous study via RNA-seq approach (23) and classified into four categories as listed above. For each transcription level, the numbers of genes associated with a +1 nucleosome of a greater AA/TT content in the entry-to-dyad region, in the exit-to-dyad region and the ratio between the two are shown, respectively. Results examined for the AAAA/TTTT element are also shown. P-values from Chi-squared tests are shown in the parentheses. In the Chi-squared tests, the null hypothesis H0 is defined as the ratio = 1.