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. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: Dev Dyn. 2014 Oct 18;243(12):1571–1580. doi: 10.1002/dvdy.24191

Figure 3. osr1 expression is induced by ectopic Nodal signaling.

Figure 3

Embryos were injected with either squint or tar*/Acvr1b RNA at 1-cell stage fixed at 4.5 hpf. (A–F) animal pole views. (A) osr1 is normally expressed in the margin of the embryo. Both squint and tar* can induce ectopic expression of osr1 in animal pole cells. Ectopic expression of sox17 (D–F) in these embryos confirms ectopic activation of Nodal signaling.