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. 2016 Dec 1;17:987. doi: 10.1186/s12864-016-3341-7

Fig. 4.

Fig. 4

Amount of predicted virulence factors grouped by their COG class. One or two asterisks indicate the classes in which a statistically significant enrichment or depletion of Spirochaetes virulence factors is observed (chi-square test) with a p-value less than 0.05 or 0.001, respectively