Traub W H, Kleber I
Zentralbl Bakteriol Orig A. 1976 May;234(4):528-35.
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.
粘质沙雷氏菌II亚组A群（噬菌体尾部）细菌素对敏感指示细胞的生物活性在两种特定的含琼脂糖培养基上完全丧失。向这两种培养基中添加0.002 M氯化钙可完全恢复这些噬菌体尾部的致死活性。另一方面，发现I亚组噬菌体尾部细菌素不需要二价阳离子。这些观察结果为区分粘质沙雷氏菌I亚组和II亚组噬菌体尾部细菌素提供了额外的生物学标准。
