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. 2017 Sep 6;7(9):170129. doi: 10.1098/rsob.170129

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© 2017 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 7. — Comparative analysis of ophiuroid tachykinin, KP and calcitonin-type precursors and neuropeptides. (a) Alignment of tachykinin-type peptides in O. victoriae (Ophiuroidea) and A. rubens (Asteroidea). (b) Schematic diagrams of the O. victoriae and A. rubens tachykinin precursors showing the location of the signal peptide (SP) and predicted neuropeptides (labelled 1–4). (c) Alignments of the long and short forms of kisspeptin (KP)-type neuropeptides in O. victoriae, A. rubens and S. purpuratus (Echinoidea). (d) Schematic diagrams of the O. victoriae and A. rubens KP precursors showing the locations of the SP, short and long orthocopies and cysteine (C) residues. (e) Alignment of calcitonin-type peptides from O. victoriae, A. rubens, S. purpuratus and A. japonicus (Holothuroidea). (f) Predicted alternative splicing of the calcitonin gene in ophiuroids, with the location of the SP and neuropeptides (CT1 and CT2) labelled. Species names: Ophionotus victoriae (Ovic), Asterias rubens (Arub), Strongylocentrotus purpuratus (Spur) and Apostichopus japonicus (Ajap).