The Draft Genome and Transcriptome of the Atlantic Horseshoe Crab, Limulus polyphemus

Figure 4

Volcano plot of day versus night showing the distribution of transcripts with respect to fold change (-axis) and statistical significance (-axis). Points above the horizontal red line indicate transcripts whose abundance is statistically significant ( value ≤ 0.05). Points to the left of −1 log₂ fold change and the right of +1 log₂ fold change indicate transcripts with at least a doubling in abundance relative to day and night. Large blue dots indicate top four contigs chosen for analysis in Table 3.