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. 2022 Apr 25;9:878107. doi: 10.3389/fvets.2022.878107

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Copyright © 2022 Liu, Wang, Zhao, Zhang, Huang and Ma.

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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Effects of Met deficiency in rearing period diets on small intestine morphologic structure of egg-laying chicks. (A) Representative samples from histological stained sections showed Met- group had lower jejunal villus height and deeper ileal crypt depth. (B) Villus height of duodenum, jejunum, and ileum. (C) Crypt depth of duodenum, jejunum, and ileum. (D) Villus height-to-crypt depth ratio (V/C) of duodenum, jejunum, and ileum. Data were presented as means ± SEM. Significant differences were tested by student's t-test. *Indicates significant difference, P < 0.05; ***, P < 0.001.