Restriction and Modification in Bacillus subtilis : Gene Coding for a Bsu R-Specific Modification Methyltransferase in the Temperate Bacteriophage Φ3T

Abstract
The resistance of Φ3T DNA to degradation by the restriction enzyme BsuR or its isoschizomer HaeIII is due to obligatory modification of such DNA. Biochemical and genetical experiments indicate that Φ3T codes for a methyltransferase, which methylates Φ3T DNA itself or heterologous DNA at target sites 5′-GG*CC. Images