. 2015 Oct 23;11(10):e1005609. doi: 10.1371/journal.pgen.1005609

Table 1. The phage-coded SaPI inducer proteins are under purifying selection ^a .

Pathogenicity island inducer	Overall mean d _N −d _S ^b	z ^c	P-value ^d
*Staphylococcus aureus*
Dut (SaPIbov1)	-0.139 ± 0.031	-4.532	< 0.0001
Sri (SaPI1)	-0.415 ± 0.127	-3.268	0.0005
SaPIbov2	-0.385 ± 0.148	-2.594	0.0047
*Enterococcus faecalis*
EfsCIV583	-0.376 ± 0.211	-1.780	0.0357

^aTable shows the statistical analysis of the d _N −d _S values obtained comparing the SaPI inducing proteins analysed in S1 Table.

^bRepresents the overall mean distance of the values shown in S1 Table (± standard error).

^c z = mean distance / standard error.

^dStatistical significance of the null hypothesis H₀: d _N −d _S = 0.

Table 1. The phage-coded SaPI inducer proteins are under purifying selection a .