Table 2.

MALDI-TOF MS data of selected biomarker peak (OmpU) of two genotype groups (GT1, toxigenic and epidemic V. cholerae O1/O139; GT2, non-toxigenic O1) obtained from two separate experiments

			m/z
	GT 1 a			GT 2
	Exp1	Exp2	Δ Exp1,Exp2	Exp1	Exp2	ΔExp1,Exp2
Mean	34750	34565	-185	34670	34495	-175
Median	34745	34565	-180	34670	34490	-180
Maximum Δ	25	30		15	30
Minimum Δ	35	50		30	35

^aO1 Hikojima isolate not included.