Figure 4
From: Species and gene divergence in Littorina snails detected by array comparative genomic hybridization
Exon/intron boundaries cause low hybridization to 60-nt probes in Littorina aCGH. Sequences of aCGH probes with low (a, c) and normal (b, d) signal in the Swedish Crab ecotype of L. saxatilis were compared to the Littorina genome draft by BLASTN. Low-signal probes had shorter lengths of the top hit than normal-signal probes (a vs. b), indicating exon/intron boundaries within low-signal probes. Identity scores for low-signal probes were slightly lower than for normal-signal probes (c vs. d). Each distribution is shown as a frequency histogram and a box plot (top panels), showing 25% and 75% quantiles (box), mean ± C.I. (diamond), median (vertical line), outliers (dots) and the densest region of the distribution (red bracket).