Immune specificities of Cluster A mycobacteriophages.

Lysogens made from Cluster A phages are listed in the top row. Serial dilutions of phages (left column) were spotted onto lawns of lysogens and scored ‘+’ if the lysogen is immune to superinfection (i.e. homoimmune) and ‘-‘ if the lysogen is not immune (i.e. heteroimmunity). ‘Beth’ = Bethlehem, ‘LRRH’ = LRRHood. Lysogens were not successfully recovered from Bethlehem, KBG, Lockley, LRRHood, or Bxz2, and thus not listed in the top row. Bethlehem, Bxb1, DD5, Jasper, KBG, Lockley, SkiPole and Solon belong to Subcluster A1, Che12, L5, Pukovnik, Redrock and D29 belong to Subcluster A2, Bxz2 is the sole member of Subcluster A3, and Eagle and Peaches belong to Subcluster A4; LRRHood is in Subcluster C1. Newly isolated phages are indicated by bold italic type.