* The fractions are of the totals that have significant sequence conservation. For the TAIR data, the first row is for RNAz calculations across the whole NOLP sequence. For non-TAIR data and for the second row for the TAIR data, these are cases that overlap CNSs (conserved non-coding sequences) identified in Haudry, et al. .
** Removing non-significantly conserved cases after Holm-Bonferroni correction.
¶ The total numbers of conserved are significantly enriched compared to randomly sampled near-gene DNA (P = 0.046 for the TAIR set, P < 0.00001 for the other two sets, normal statistics). To assess this, for each of the three actual data sets listed, 500 samples of near-gene DNA of the same distribution of sizes and position relative to neighbour genes as the actual set were generated (as described in the Methods).