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β-Arrestin mediates WNT-11- but not WNT-5A-induced gastrulation movements in Xenopus laevis embryos. Keller open-face explant elongation (A,B, upper panels) and constriction (B, lower panel) were scored in X. laevis embryos injected with indicated RNAs and morpholinos (MOs). Asterisks indicate values that are significantly different (P>0.95, t-test) from xWNT-11 and xWNT-11 MO.
