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. 1998 Jun;64(6):2269–2272. doi: 10.1128/aem.64.6.2269-2272.1998

TABLE 1.

MICs for plantaricin peptidesa

Indicator strain Peptide MIC (nM) of:
PlnJK PlnEF PlnA 22-mer PlnA 26-mer
Pediococcus pentosaceus Pac 1.0 50 5 100 100
Lactobacillus plantarum 965 0.1 7 500 300
Lactobacillus casei subsp. casei NCDO 161 ≥400 20 250 250
Lactobacillus casei NCDO 2713 ≥400 150 ≥6,000 ≥6,000
Lactobacillus sake NCDO 2714 50 4 250 60
Lactobacillus viridescens NCDO 1655 5 2 50 20
Pediococcus pentosaceus NCDO 990 ≥400 30 ≥6,000 ≥6,000
Carnobacterium piscicola UI49 ≥400 ≥400 ≥6,000 ≥6,000
Lactobacillus plantarum UI50 ≥400 ≥400 ≥6,000 ≥6,000
Lactobacillus sake 706 ≥400 100 ≥1,000 ≥500
Pediococcus acidilactici CH ≥400 10  NTb ≥500
Lactobacillus curvatus 89 ≥400 5 NT ≥500
a

Bacteriocin activity was determined as described previously (22). The values are the concentrations of peptides that caused 50% growth inhibition of the indicator strains. The peptides making up PlnJK and PlnEF were mixed at a 1:1 ratio. PlnN was tested against all indicator strains, but no antagonistic activity was detected at any concentration (the highest concentration tested was approximately 1 μM). The PlnA 23-mer peptide was tested against L. plantarum 965 and exhibited antagonistic activity similar to that of the PlnA 22-mer peptide. 

b

NT, not tested.