Table 2. Polymorphism and average SNPs of the hap2 gene among different distinct B. bovis strains.

	Texas	Mo7	Argentina L17 virulent	Argentina L17 attenuated
Nucleotide substitutions	21	28	20	27
Synonymous substitutions	9	10	8	10
Non-synonymous substitutions	12	18	12	17
Average dN	0.0039	0.0044	0.0035	0.0044
Average dS	0.0052	0.0079	0.0052	0.0074
ω (dN/dS)	0.75	0.55	0.67	0.59

dN: non-neutral polymorphism divergence; dS: neutral divergence.