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. 2020 Dec 3;10:21156. doi: 10.1038/s41598-020-77890-6

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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The phylogeny and conservation of CRISPR-leaders, CRISPR1 (a), and CRISPR2 (b) across Salmonella serovars. The CRISPR-leader sequences were aligned using MUSCLE and the phylogenetic tree was constructed using ML. (c) A matrix depicting the inter-species and inter-subspecies conservation of the leader sequence of both the CRISPR arrays. The values represent the percent nucleotide identity with respect to the entire query cover. The reference strains are S. enterica subsp. enterica serovar Typhimurium str.14028S, Typhi str. CT18, S. enterica subsp. arizonae str. NCTC10047, S. enterica subsp. diarizonae str. MZ0080 and S. bongori str. SA19983605.