Biosafety classification is based on U.S. Public Health Service Guidelines, it is the responsibility of the customer to ensure that their facilities comply with biosafety regulations for their own country.
Pecota DC, Wood TK. Exclusion of T4 phage by the hok/sok killer locus from plasmid R1. J. Bacteriol. 178: 2044-2050, 1996. PubMed: 8606182
