Unusually infrequent cleavage with several endonucleases and physical map construction of Bacillus subtilis bacteriophage phi 1 DNA

Abstract
HaeIII, BalI, StuI, BamHI SlaI and EcoRII did not cut the genome of B. subtilis phage .vphi.1 at all; ThaI, BglII, EcoRI, SalI and Bsu1247I cut the genome once or twice. The physical map of the .vphi. genome was constructed with the latter restriction endonucleases.