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. 2017 Aug 2;8:1342. doi: 10.3389/fpls.2017.01342

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Copyright © 2017 Spyropoulou, Dekker, Steemers, van Maarseveen, de Koster, Haring, Schuurink and Allmann.

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) or licensor 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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Recombinant proteins of two HI cucumber homologs have (3Z):(2E)-hexenal isomerase activity. (A) Structures of the GLVs Z-3-hexenal and E-2-hexenal. (B) GLV-related GC-QTOF-MS extracted ion chromatogram (Ion 69) as output of the SPME-guided assay for measuring (3Z):(2E)-hexenal isomerase activity. Equal amounts of purified recombinant protein (2 μg each) were tested for isomerase activity. Buffer and recombinant protein of GST (EV) were used as control. Only Cs03390 and Cs078390 but not Cs033080 and Cs240840 showed activity. Z-3-hexenal was used as substrate. HI; hexenal isomerase.