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Science 24 November 1967:
Vol. 158. no. 3804, pp. 1052 - 1053
DOI: 10.1126/science.158.3804.1052
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Articles

Starfish Gonad: Action and Chemical Identification of Spawning Inhibitor

S. Ikegami 1, S. Tamura 1, and H. Kanatani 2

1 Department of Agricultural Chemistry, University of Tokyo, Bunkyo-ku, Tokyo, Japan
2 Ocean Research Institute, University of Tokyo, Nakano-ku, Tokyo

The gamete-shedding substance obtained from the radial nerves induces spawning when it is applied to the gonads of mature starfish in vivo and in vitro. A substance that inhibits the action of this spawning factor is present in both ovary and testis; it has been isolated from testis of Asterina pectinifera and chemically identified as L-glutamic acid.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)