| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Research Abstract |
Pentameral symmetry is a characteristic of echinoderms, which do not have a clear anterior-posterior axis and lack head structures. Hox cluster genes are broadly conserved across deuterostomes and protostomes, and are demonstrated a linear cluster structure in the genome. Expression patterns on the anterior-posterior axis are also identical in the ordering of the genes in the genome and in developmental stages, demonstrating a relation to formation patterns along the anterior posterior axis. The spatial expression patterns of crinoid Oxycomanthus japonicus and sea cucumber Apostichopus japonicus were examined. Co-linearity expression of the Hox gene cluster along the axis is not observed in Oxycomanthus japonicus; however the co-linearity expression along the gut in Apostichopus japonicus; which has obvious external anterior posterior axis, is observed. The results imply that the function of Hox cluster genes is different in different groups of echinoderm.
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