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Fig. 4
The Hedgehog pathway is activated immediately after tail excision. a ihhb expression is detected within the notochord bead and continues until 30 hpe (0 hpe 2/10, more than 8/10 for the other time points, number of experiments = 3). Expression of ptch1 is upregulated by 18 hpe and continues after 30 hpe (10/10 for both time points, n = 2). Arrowheads point to expression domains. b Oblique and coronal sections reveal that ihhb is expressed in the notochord before (12/14, number of experiments = 2). c ihhb is expressed in the notochord after tail excision (7/7, number of experiments = 2)
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Full text @ Nat. Commun.