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.
Schlesinger S, Nester EW. Mutants of Escherichia coli with an altered tyrosyl-transfer ribonucleic acid synthetase. J. Bacteriol. 100: 167-175, 1969. PubMed: 4898984
