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. 2007 Jan 11;7:3. doi: 10.1186/1471-213X-7-3

Figure 3.

Figure 3

Stabilization of zebrafish vasa and translational regulation of medaka olvas mRNA in PGCs of medaka. 100 pg of GFP tagged fusion RNAs were injected at the 2-cell stage. (A to D) The embryos were fixed at early somitogenesis and at 12-somite stage and in situ hybridization using a GFP antisense RNA probe was performed to reveal the spatial distribution of the injected RNAs. In the control embryos the GFP-globin RNA is degraded uniformly in all cells (A and C) whereas in vasa-GFP injected embryos (B and D), the PGCs retain the injected RNA (arrows in D) while it is degrading in somatic cells. (E to S) olvas-GFP (E to I) as well as GFP-zfvasa 3'UTR (J to N) constructs were injected in medaka and followed for GFP expression and compared to control GFP-β globin 3'UTR injected embryos (O to S). Interestingly, in medaka, olvas-GFP protein expression was rapidly restricted to PGCs (E to I), while zebrafish vasa 3'UTR did not induced selective GFP expression.