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Fig. S1 Sections through the pharyngeal arch region show cxcr4a and sdf1b expression is excluded from the ectoderm. (A) Sagittal section of 25 hpf wild type embryo stained for cxcr4a mRNA expression, arrow points to expression throughout the mesenchyme and arrowheads shows exclusion from the ectoderm. cxcr4a is also significantly reduced in the mesodermal core (B) Transverse section of 25 hpf wild type embryo stained for sdf1b expression. Expression is absent from the ectoderm (arrowhead) but present in the endoderm (arrow). Nt, neural tube; m, mesoderm.
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Reprinted from Developmental Biology, 333(1), Olesnicky Killian, E.C., Birkholz, D.A., and Artinger, K.B., A role for chemokine signaling in neural crest cell migration and craniofacial development, 161-172, Copyright (2009) with permission from Elsevier. Full text @ Dev. Biol.