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. 2019 Mar 25;374(1772):20180092. doi: 10.1098/rstb.2018.0092

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© 2019 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 2. — The diversity of CRISPR spacers in environmental Thermus samples. (a) The diversity of 14 872 spacers (spacer cluster centres) associated with Thermus CRISPR repeats from enrichment cultures obtained from samples collected at indicated sites is shown in the circular diagram. Spacers from the same location that differ from each other by fewer than two nucleotides are connected by matching colour lines. For del Flaco, samples #1 and #2 were collected in December 2013 and samples #3–#5 in March 2016. For Vesuvius, samples #1 and #2 were collected in October 2014 and samples #3–#6 in October 2018. (b) Spacers from the same location are merged. The resulting diversity of unique 7877 spacers is shown in the circular diagram. Spacers from different locations that differ from each other by fewer than two nucleotides are connected by matching colour lines. The colour labelling scheme is the same as in figure 1. Grey colour histograms on the outside show cluster size in log₁₀ scale.