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. 2022 Oct 21;11(10):1451. doi: 10.3390/antibiotics11101451

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Comparison of the amino acid compositions of four AMP classes ( $α$ , $β$ , $α β$ , and non- $α β$ ) based on the 721 records of structurally-annotated natural peptides in the APD3 database.