Table 1.
The 16 palindromes of length 4 and an equal number of non-palindromes, their mean ratio R of occurrence to expectancy, and variance of R, across 200 genomes
| Palindrome | R | Var(R) | Non-palindrome | R | Var(R) |
|---|---|---|---|---|---|
| AATT | 0.97 | 0.06 | AAGG/CCTT | 1.23 | 0.09 |
| ATAT | 0.85 | 0.05 | ACAG/CTGT | 1.04 | 0.08 |
| TATA | 0.68 | 0.07 | ACTG/CAGT | 0.94 | 0.06 |
| TTAA | 0.84 | 0.10 | AGAC/GTCT | 0.87 | 0.05 |
| ACGT | 0.63 | 0.12 | CAAC/GTTG | 1.10 | 0.06 |
| AGCT | 1.13 | 0.13 | CAGA/TCTG | 1.16 | 0.12 |
| CATG | 0.99 | 0.09 | CCAA/TTGG | 1.24 | 0.12 |
| CTAG | 0.67 | 0.14 | CTGA/TCAG | 1.06 | 0.08 |
| GATC | 0.86 | 0.16 | GAGA/TCTC | 1.14 | 0.09 |
| GTAC | 0.71 | 0.05 | GGAA/TTCC | 1.30 | 0.11 |
| TCGA | 0.84 | 0.39 | GTCA/TGAC | 0.87 | 0.04 |
| TGCA | 1.15 | 0.15 | GTGA/TCAC | 0.94 | 0.04 |
| CCGG | 0.89 | 0.24 | TCCT/AGGA | 1.29 | 0.12 |
| CGCG | 0.62 | 0.27 | TGAG/CTCA | 1.07 | 0.07 |
| GCGC | 0.80 | 0.28 | TGGT/ACCA | 1.13 | 0.08 |
| GGCC | 1.15 | 0.32 | TGTC/GACA | 0.92 | 0.04 |
| Overall | 0.86 | 0.19 | Overall | 1.08 | 0.10 |
Values significantly deviating from 1 are given in bold (P < 0.01, one-way ANOVA followed by Dunnett's multiple comparison test).