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. 2019 Dec 20;71(6):1943–1955. doi: 10.1093/jxb/erz560

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© The Author(s) 2019. Published by Oxford University Press on behalf of the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 8. — Activation of the proproteases CEP1, RD19A, and RD19C. (A) Purified and mature recombinant βVPE: (a) and (c) mature βVPE protein created by self-cleaving at pH 5.2; (b) recombinant pro-βVPE. (B) Purified and mature recombinant CEP1: (a) recombinant pro-CEP1 at pH 7.0; (b) mature CEP1 protein created by self-cleaving at pH 3.0; (c) pro-CEP1 at pH 5.2; (d) mature CEP1 protein created by mediation of βVPE. (C) Immunoblot analysis of total anther protein extracts from stages 5 to 12 with anti-mature CEP1 antibody, anti-mature RD19A antibody, and anti-mature RD19C antibody.