Table 2.

Twenty putative genes sorted by maximum importance across the food sources.

Loci	Gene	Protein Name	Dairy	Fruits	Leafy Greens	Meat	Poultry	Seafood	Vegetables
lmo2702	recR	Recombination protein RecR	0.6653	0.5945	0.6925	0.8315	0.7212	0.6219	0.6653
lmo2401	lmo2401	Hypothetical protein	0.7017	0.663	0.6997	0.8231	0.7664	0.663	0.7017
lmo2615	rpsE	30S ribosomal protein S5	0.6873	0.5786	0.708	0.8199	0.7465	0.6081	0.6873
lmo2577	lmo2577	Hypothetical protein	0.7066	0.6611	0.6809	0.808	0.7851	0.6611	0.7066
lmo1501	lmo1501	Hypothetical protein	0.6925	0.6014	0.6839	0.8022	0.716	0.6374	0.6925
lmo1933	folE	GTP cyclohydrolase 1	0.577	0.6111	0.599	0.8012	0.7435	0.627	0.6111
lmo2215	lmo2215	Similar to ABC transporter (ATP-binding protein)	0.692	0.6473	0.6633	0.7988	0.72	0.6473	0.692
lmo0821	lmo0821	Hypothetical protein	0.6641	0.6641	0.7076	0.7979	0.7461	0.6641	0.657
lmo1715	lmo1715	Methyltransferase	0.674	0.6314	0.6612	0.7963	0.7371	0.6314	0.674
lmo2515	degU	NarL family, response regulator DegU	0.6923	0.6482	0.6759	0.7952	0.7781	0.6482	0.6923
lmo0625	lmo0625	Putative lipase/acylhydrolase	0.6548	0.6242	0.6813	0.7945	0.743	0.6242	0.6548
lmo0544	srlA	PTS sorbitol transporter subunit IIC	0.7125	0.6483	0.7073	0.7928	0.7713	0.6483	0.7125
lmo2728	mlrA	Transcriptional regulator, MerR family protein	0.62	0.6322	0.6294	0.7909	0.6994	0.6041	0.6322
lmo2348	lmo2348	Amino acid ABC transporter permease	0.6776	0.6673	0.681	0.7901	0.7512	0.6673	0.6776
lmo2422	cesR	Two-component response regulator	0.6988	0.6498	0.6574	0.7883	0.7307	0.6498	0.6988
lmo0623	lmo0623	Hypothetical protein	0.6382	0.6382	0.6382	0.7877	0.7026	0.6382	0.6307
lmo0635	lmo0635	Hypothetical protein	0.6715	0.6715	0.7008	0.7872	0.744	0.6715	0.656
lmo2658	lmo2658	Hypothetical protein	0.5621	0.5409	0.5969	0.7859	0.6298	0.5644	0.5621
lmo0611	azoR1	Azoreductase	0.626	0.6511	0.7853	0.7737	0.626	0.626	0.6511
lmo1425	lmo1425	Hypothetical protein	0.7079	0.651	0.6755	0.7852	0.7607	0.651	0.7079

Note: The numbers represent importance based on the accuracies of source prediction by each feature (genes). These values are the area under the receiver operating characteristic curve (AUC-ROC) determined from source-specific sensitivities and specificities (Supplementary Tables S1 and S2).