Cover: Ectopic expression of Lkb1 induces a secondary body axis in Xenopus embryos. Lkb1 mRNA (500 pg) was injected into one ventro-vegetal cell of eight-cell embryos. These were then allowed to develop to stage 32. The lower embryo has been injected with Lkb1, the upper embryo is a control. See Report by Smith et al., in this issue, pp. 2869-2877.
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