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

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© The Author(s) 2020

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Graphic map of spacer conservation in CRISPR1 (a) and CRISPR2 (b) array for Salmonella serovars. The shades of grey represent the conservation percentage of a given spacer in all the strains of the respective serovar where, the darker box indicate the presence of spacer in most of the strains (black: 100%) while, the lighter box indicate the presence of spacer in a few strains. *Indicates merging of two spacers in a few strains of serovar Typhi.