| Xenopus | <molecular biology> The genus of African clawed toads, X. Laevis is widely used in developmental biology and was formerly used in pregnancy diagnosis. Ovulates easily under influence of luteinising hormone. (18 Nov 1997) |
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| xenopus laevis | The commonest and widest ranging species of the clawed "frog" (xenopus) in africa. This species is used extensively in research. There is now a significant population in california derived from escaped laboratory animals. (12 Dec 1998) |