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Figure 2 | BMC Genomics

Figure 2

From: Phase variation and microevolution at homopolymeric tracts in Bordetella pertussis

Figure 2

Observed/expected plots of different length HPTs in the B. pertussis and B. bronchiseptica genomes. Expected frequencies of A and C HPTs in the B. pertussis Tohama I (Bp) and B. bronchiseptica RB50 (Bb) genomes were calculated for a range of tract lengths using a second order Markov model. For each tract length, observed/expected values were determined by dividing the actual number of HPTs greater than or equal to that tract length by the expected number. The observed/expected value for A HPTs drops to zero at tract length of 10 because neither genome harbors an A HPT with more than 9 bases.

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