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. 2020 May 27;11:339. doi: 10.3389/fendo.2020.00339

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Copyright © 2020 Takahashi.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Hydra stem cell system. (A) Cell differentiation in Hydra. (B) A feedback model for the control of neuron differentiation that involves the antagonistic action of Hym-355 and the PW peptide, Hym-33H.