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. 2019 Mar 8;10:204. doi: 10.3389/fphys.2019.00204

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Copyright © 2019 Bonelli, Bruno, Caccia, Sgambetterra, Cappellozza, Jucker, Tettamanti and Casartelli.

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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Aminopeptidase N activity in the different midgut regions using L-leucine p-nitroanilide as substrate. The values are reported as mean ± SEM of at least 3 experiments. In the anterior and middle midgut no activity was detected (n.d.).