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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 (http://creativecommons.org/licenses/by/4.0/).
An illustrative example of PCA and hierarchical analysis: (A) projections of antimicrobial genes onto the PC1~PC2 space based on the occurrence of these genes detected in foodborne pathogens; (B) clustering of the genes based on their projections in (A).