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. 2019 May 29;9(5):190057. doi: 10.1098/rsob.190057

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© 2019 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 17. — The model of figure 16h,i, modified by initiating an outgrowth. (a–d) At the time when the outgrowth is initiated, in cross-section. (a) ∇POL2 and its plus and minus organizers, (b) ∇POL and its plus organizer, (c) k_par2, (d) k_per. (e,f,g) The subsequent development, showing k_per and ∇POL2.