US proposes exemptions from DNA guidelines.
D004269:DNA, Bacterial / Q000235:genetics; D004274:DNA, Recombinant; D004279:DNA, Viral / Q000235:genetics; D035082:Federal Government; D033161:Government Regulation; D009316:National Institutes of Health (U.S.); D012107:Research Design / Q000592:standards; D014481:United States
D004269:DNA, Bacterial; D004274:DNA, Recombinant; D004279:DNA, Viral