Identification of the sperm motility-initiating substance in the newt, Cynops pyrrhogaster, and its possible relationship with the acrosome reaction during internal fertilization

Toshihiko Watanabe, Hideo Kubo, Shinya Takeshima, Mami Nakagawa, Manami Ohta, Saori Kamimura, Eriko Takayama-Watanabe, Akihiko Watanabe and Kazuo Onitake

The International Journal of Developmental Biology 54 ( 4 ): 591 - 597 , 2010