title: Studies on group A (phage tail) bacteriocins of Serratia marcescens. VI. Calcium ion-dependent biological activity of subgroup II bacteriocins.
abstract: The biological activity of subgroup II group A (phage tail) bacteriocins of Serratia marcescens against susceptible indicator cells was completely abolished on two defined, Agarose-containing media. The addition of 0.002 M CaC12 to these two media fully restored the lethal activity of these phage tails. Subgroup I phage tail bacteriocins, on the other hand, were found to have no requirement for divalent cations. These observations furnished an additional biological criterion for the differentiation of subgroup I and II phage tail bacteriocins of S. marcescens.
mesh_terms: D001430:Bacteriocins / Q000032:analysis / Q000145:classification / Q000494:pharmacology*; D002118:Calcium / Q000494:pharmacology*; D003470:Culture Media; D008826:Microbial Sensitivity Tests; D012706:Serratia marcescens / Q000032:analysis* / Q000145:classification / Q000187:drug effects
chemical_list: D001430:Bacteriocins; D003470:Culture Media; D002118:Calcium