A chemoattractant for ascidian spermatozoa is a sulfated steroid.

  title={A chemoattractant for ascidian spermatozoa is a sulfated steroid.},
  author={Manabu Yoshida and Michio Murata and Kazuo Inaba and Masaaki Morisawa},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={99 23},
Sperm chemotaxis toward eggs before fertilization has been demonstrated in many animals and plants, and several peptides and small organic compounds acting as chemoattractants have been identified. We previously showed that sperm of the ascidians Ciona intestinalis and Ciona savignyi are activated and then attracted toward the egg by a common factor released from the egg. In this study, we purified sperm-activating and -attracting factor (SAAF) from the egg-conditioning medium of C… CONTINUE READING
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Controls of Sperm Motility: Biological and Clinical Aspects, ed

  • M. P. Cosson
  • 1990

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