Nisin

It is a bacteriocin produced by Lactococcus lactis is active against Gram + bacteria (Staphylococcus spp., Listeria spp., Lactobacillus spp., Leuconoctoc spp., Pediococcus spp., Micrococcus spp., Streptococcus spp., Lactococcus spp., Bacillus spp., Clostridium spp.) and seeds but that is not active against yeasts and molds.