TABLE 1.

MIC, mutation position, and amino acid alteration in the β subunit and base alteration in the rpoB gene resulting in rifampin resistance in L. monocytogenes

Mutant no.	Rifampin MIC (μg/ml)	Amino acid		Base change	Rifr clustera
		Position	Change
7	15	473	Asp→Asn	GAT→AAT	I
8	5	473	Asp→Asn	GAT→AAT	I
5	0.5	473	Asp→Gly	GAT→GGT	I
20	100	479	Gly→Asp	GGC→GAC	I
22	100	483	His→Tyr	CAT→TAT	I
23	10	483	His→Leu	CAT→CTT	I
14	5	528	Ile→Phe	ATT→TTT	II
6, 17	0.5	530	Ser→Tyr	TCC→TAC	II

^aHomologous position of mutation in relation to E. coli Rif^r clusters.