Properties ofStreptomyces phage SLE111

Abstract
Phage SLE111 infecting S. levoris 1331 was morphological different from most actinophages described and yielded very high titers after lytic growth. Typical morphological changes of infected hyphae were observed by phase contrast and EM of ultrathin sections. The double-stranded, linear DNA was characterized, according to EM analysis, by absence of cohesive ends, of terminal redundance and circular permutation. A stem-loop structure containing inverted repeats of .apprx. 200 base pairs was identified by EM in 2 alternative positions in the SLE111 genome.