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.
Litt M, et al. Chromosomal localization of the human proenkephalin and prodynorphin genes. Am. J. Hum. Genet. 42: 327-334, 1988. PubMed: 2893547
Horikawa S, et al. Isolation and structural organization of the human preproenkephalin B gene. Nature 306: 611-614, 1983. PubMed: 6316163
James Douglass, personal communication
