Patterning Lessons from a Dorsalized Embryo

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Patterning Lessons from a Dorsalized Embryo Miriam I. Rosenberg, Claude Desplan Developmental Cell Volume 14, Issue 4, Pages 455-456 (April 2008) DOI: 10.1016/j.devcel.2008.03.019 Copyright © 2008 Elsevier Inc. Terms and Conditions

Figure 1 Model of DV Patterning in Tribolium (A) A self-organized system biased ventrally (perhaps by a maternal system similar to Drosophila) leads to robust ventral activation of Tc-Dorsal (arrow 1). (B) A second self-organized loop involves Dpp. It is likely biased dorsally by Tc-Sog, which links the two systems (arrow 2). This permits the specification of a range of DV cell fates in emergent posterior segments. (C) After gastrulation, Twist expression in the growth zone leads to ventral patterning of posterior segments (arrow 3). Developmental Cell 2008 14, 455-456DOI: (10.1016/j.devcel.2008.03.019) Copyright © 2008 Elsevier Inc. Terms and Conditions