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. 2007 Nov 21;36(1):300–310. doi: 10.1093/nar/gkm1016

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© 2007 The Author(s)

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 6. — The nrdEF genes in the B. cereus group. (A) Gene map showing the positioning of the genes and IG-sequence within the operon and the IVS insertion points in the operon. Phylogenetic trees based on the sequence of the (B) nrdIEF operon, (C) nrdE-coding sequences and (D) nrdF-coding sequences from 39 strains of the B. cereus group. Symbols represent the presence of IVS in the strain where filled and empty symbols represent a group I intron with and without HEG, respectively. Colours represent the IG-sequence groups each strain belongs to. The distance bars represent the number of nucleotide changes in the sequence alignments. Only bootstrap values below 75% are shown.