Fig. 1

Features of the Octopus vulgaris brain and arm transcriptome. We sequenced the supra-esophageal (SEM) and sub-esophageal (SUB) masses and optic lobe (OL) as representatives of the brain and the medial segment of an arm (ARM), including the arm nerve cord, as the representative of the peripheral system. a Expression levels for coding and non-coding transcripts. Non-coding transcripts are on average expressed at lower levels than coding. b Percentage of the expressed non-coding transcripts. Brain sample results enriched for non-coding. c Percentages of transcripts expressed and their relative distribution among the most represented GO biological processes. A higher percentage of transcripts belonging to classes related to transposable elements and cell adhesion are expressed in the brain. Transcripts likely to be involved in signal transduction and translation constitute a larger quota in the arm