Fig. 2. Temporal expression profile of Xanx-4; RT-PCR analysis showing the expression pattern of Xanx-4 transcripts in Xenopus laevis unfertilised egg and embryo stages. Maternal expression is detected in the egg that is much reduced by the 32-cell stage. Zygotic expression is detected at low levels between stages 9 and 12.5, and at a significantly increased level at stage 13, which is maintained through to stage 41.

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