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. 2004 Apr;15(4):1647–1655. doi: 10.1091/mbc.E03-09-0674

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Figure 6. — Activated FGFR1 induces ectopic posterior protrusions in whole embryos. (A) Morphology of embryos left uninjected or injected with 50 pg of an activated FGFR1 (actFGFR1). (B) Whole mount in situ hybridization analysis of ectopic protrusions produced by actFGFR1. Stage 26/28 embryos injected with actFGFR1 were fixed and probed with posterior markers (Xpo, Xwnt3a, and Xhox-3), neural crest marker (Xap-2), and FGF-8. Arrows indicate staining of ectopic protrusions by the indicated probes.