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A chemoattractant for ascidian spermatozoa is a sulfated steroid.
Yoshida M, Murata M, Inaba K, Morisawa M. Yoshida M, et al. Proc Natl Acad Sci U S A. 2002 Nov 12;99(23):14831-6. doi: 10.1073/pnas.242470599. Epub 2002 Oct 31. Proc Natl Acad Sci U S A. 2002. PMID: 12411583 Free PMC article.
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